ChatGPT: What It Is, How It Works & How to Use It

ChatGPT: The Complete Independent Guide

ChatGPT is an artificial intelligence assistant created by OpenAI. It can answer questions, explain topics, write and edit content, analyse uploaded files, generate images, help with coding, search for information and hold natural conversations. People use ChatGPT for work, education, creativity, research and everyday problem-solving.

What is ChatGPT?

ChatGPT is a chatbot founded by the company OpenAI. It can write essays, scripts, poems, and solve computer coding in a human-like way. It can even have conversations and admit mistakes!

What does ChatGPT stand for?

GPT stands for Generative Pre-Trained Transformer. This means that it learns what to say by capturing information from the internet.

It then uses all of this text to "generate" responses to questions or commands that someone might ask.

ChatGPT: The Complete Guide to What It Is, How It Works and How to Use It

ChatGPT has changed the way millions of people interact with artificial intelligence.

Instead of needing specialist technical knowledge, users can simply type or speak a question and receive a response in natural language.

ChatGPT can explain difficult subjects, help write documents, analyse information, generate ideas, assist with coding, work with uploaded files and support many everyday tasks.

But the rapid growth of ChatGPT has also created questions.

• What exactly is ChatGPT?

• How does ChatGPT work?

• Is ChatGPT free?

• Can ChatGPT access your computer or phone?

• Does it save your conversations?

• Is it safe for children?

• Can you trust its answers?

This independent guide brings the most important information about ChatGPT together in one place. It is designed for beginners, parents, students, professionals and anyone who wants to understand how the technology works.

If you are completely new to the platform and want practical instructions, our complete beginner's guide to using ChatGPT explains the process step by step.

What Is ChatGPT?

ChatGPT is an artificial intelligence assistant developed by OpenAI.

The name combines “Chat”, referring to conversation, with “GPT”, which stands for Generative Pre-trained Transformer.

In simple terms, ChatGPT is designed to understand instructions and generate useful responses.

You can ask it a question in ordinary language, much as you would ask another person. Depending on the features available, ChatGPT can work with text, images, files, voice and other types of information.

For example, you can ask ChatGPT to:

• explain a complicated subject in simple language;

• improve an email;

• summarise a long document;

• brainstorm ideas;

• help plan a project;

• analyse uploaded information;

• Explain computer code;

• create images;

• Translate text;

• compare options; or

• Answer follow-up questions.

The important point is that ChatGPT is not simply a database containing fixed answers.

It generates responses based on your request, the conversation context, the capabilities available to it and, in some situations, information obtained through tools.

This ability to respond conversationally is one of the main reasons ChatGPT became so widely known.

ChatGPT at a Glance

Question	Quick Answer
What is ChatGPT?	An artificial intelligence assistant
Who created ChatGPT?	OpenAI
What does GPT stand for?	Generative Pre-trained Transformer
Is ChatGPT free?	A free version is available
Can ChatGPT answer questions?	Yes
Can ChatGPT write content?	Yes
Can ChatGPT read files?	Yes, supported files can be uploaded
Can ChatGPT read PDFs?	Yes
Can ChatGPT generate images?	Yes, when image generation is available
Can ChatGPT make mistakes?	Yes
Is ChatGPT a search engine?	Not exactly
Can ChatGPT replace human judgement?	No
Should you share passwords with ChatGPT?	No

Who Created ChatGPT?

ChatGPT was created by OpenAI, an artificial intelligence research and technology company.

The public launch of ChatGPT in November 2022 introduced millions of people to conversational generative AI. Users who had never previously interacted with advanced artificial intelligence could suddenly ask questions and receive detailed responses in seconds.

Since then, ChatGPT has evolved considerably.

The early experience was primarily text-based. Modern versions of ChatGPT can offer a much broader range of capabilities, depending on the plan, device, location and features available.

These may include:

• web search;

• file uploads;

• document analysis;

• image understanding;

• image generation;

• voice conversations;

• memory and personalisation;

• data analysis;

• coding assistance; and

• Connections with other tools and services.

Because ChatGPT changes frequently, individual features can be introduced, updated or removed over time. For this reason, users should always check the current information when a specific feature is important.

How Does ChatGPT Work?

ChatGPT is powered by artificial intelligence models trained to recognise patterns in language and other forms of information.

When you enter a prompt, ChatGPT analyses your request and generates a response based on patterns learned during training, the context of the current conversation and any relevant tools or information available to it.

A simplified version of the process looks like this:

1. You enter a prompt.

2. ChatGPT analyses the words and context.

3. The AI identifies what you appear to be asking.

4. It generates a response.

5. You can ask a follow-up question or provide more instructions.

The technology behind systems such as ChatGPT is complex. If you want to understand the underlying technology in greater depth, read our guide to large language models and how they work.

One of the most useful features of ChatGPT is its ability to follow a conversation.

For example, you might first ask:

“Explain photosynthesis.”

You could then say:

“Explain it for a ten-year-old.”

Then:

“Give me five quiz questions.”

ChatGPT can use the earlier conversation as context, so you do not always need to repeat the entire request.

What Is a Prompt in ChatGPT?

A prompt is the instruction, question or information you give to ChatGPT.

A simple prompt could be:

“Give me three dinner ideas.”

A more detailed prompt could be:

“Give me three affordable vegetarian dinner ideas for a family of four. Each meal should take less than 30 minutes to prepare.”

The second prompt is likely to produce a more useful answer because it provides additional context.

Good prompts often explain:

• what you want;

• Why do you need it;

• who the answer is for;

• What format do you prefer;

• What should be included, and

• What should be avoided?

You do not need to learn complicated commands to use ChatGPT. However, clearer instructions usually produce better results.

What Can ChatGPT Do?

ChatGPT can help with a wide range of tasks, but its usefulness depends heavily on how it is used.

Common uses include writing, learning, research, planning, coding, creativity and problem-solving.

ChatGPT Can Answer Questions

You can ask questions about:

• history;

• science;

• technology;

• language;

• business;

• everyday problems;

• general knowledge; and

• Many other subjects.

However, ChatGPT should not automatically be treated as a perfect source of truth.

For important decisions, particularly those involving health, law, money or safety, information should be checked against reliable sources and qualified professionals where appropriate.

ChatGPT Can Explain Difficult Subjects

One of the most useful features of ChatGPT is its ability to adjust an explanation.

You can ask:

“Explain this simply.”

“Give me an example.”

“Explain this as if I am a beginner.”

“Now explain the technical version.”

This makes ChatGPT useful for people who want to understand a subject rather than simply find a definition.

ChatGPT Can Help With Writing

ChatGPT can help:

• draft emails;

• rewrite paragraphs;

• improve grammar;

• adjust tone;

• create outlines;

• generate ideas;

• summarise text, and

• Organise information.

The quality of the final result still depends on human review.

AI-generated writing can sometimes sound repetitive, generic or overconfident. Important documents should be checked carefully before they are sent, submitted or published.

ChatGPT Can Help With Coding

Programmers and beginners use ChatGPT to:

• Explain code;

• identify possible errors;

• suggest approaches;

• write examples;

• compare programming methods; and

• Learn technical concepts.

Code generated by AI should be tested and reviewed. A response that looks convincing can still contain errors, security problems or outdated methods.

ChatGPT Can Work With Files

Depending on the features available, users can upload supported documents and ask ChatGPT questions about them.

For example, you might upload a document and ask ChatGPT to:

• summarise it;

• identify key points;

• explain difficult sections;

• find specific information;

• compare sections; or

• Create questions based on the content.

PDF support is particularly useful. Our detailed guide explains how ChatGPT can read, summarise and analyse PDF files.

ChatGPT Can Help Generate Ideas

ChatGPT can be useful when you know the problem but do not yet know the solution.

People use it to brainstorm:

• business ideas;

• article topics;

• names;

• lesson activities;

• travel plans;

• content ideas;

• project approaches; and

• Possible solutions.

The best results often come from treating the first response as a starting point rather than the final answer.

How to Use ChatGPT

Using ChatGPT is straightforward.

Step 1: Open ChatGPT

Go to the official ChatGPT service or open the official app.

Be careful with websites and applications that imitate well-known AI services. Check that you are using the genuine service before entering personal information or payment details.

Step 2: Start a Conversation

Type a question or instruction into the message box.

For example:

“What is artificial intelligence?”

Then send the message.

Step 3: Read the Response Critically

Do not assume that every answer is correct simply because it sounds confident.

Check:

• names;

• dates;

• statistics;

• quotations;

• sources;

• calculations; and

• important factual claims.

Step 4: Ask Follow-Up Questions

You can improve the answer by continuing the conversation.

Try instructions such as:

“Make that shorter.”

“Give me an example.”

“Explain the second point.”

“Put the information in a table.”

“What are the disadvantages?”

This conversational process is one of the main differences between ChatGPT and traditional search.

For a complete walkthrough, visit our step-by-step guide to using ChatGPT.

Is ChatGPT Free?

Yes. ChatGPT has a free version.

OpenAI also offers paid plans with different levels of access, usage limits and features.

The exact plans and features can change, so it is better to check current pricing before making a purchase decision.

In general, the free version can be suitable for:

• beginners;

• occasional questions;

• basic writing help;

• learning how ChatGPT works; and

• Testing whether AI is useful for you.

Paid options may appeal more to people who use ChatGPT frequently or need higher usage limits and access to additional capabilities.

For a more focused explanation, read our complete guide answering is ChatGPT free to use?.

Do You Need an Account to Use ChatGPT?

Account requirements can depend on the way you access ChatGPT, your location and the features you want to use.

Creating an account can provide access to features such as saved conversation history and other personalised functionality.

Users should review the current sign-in options and privacy controls available to them.

If you create an account, use a strong and unique password and never share your login details with other people.

What Is the ChatGPT App?

The official ChatGPT app allows users to access the AI assistant on supported mobile and desktop devices.

An app can make ChatGPT more convenient for:

• voice conversations;

• quick questions;

• working away from a desk;

• uploading supported content; and

• Using device-specific features where available.

Before installing an app, check the developer and source carefully.

Third-party applications may use names, logos or descriptions that make them appear connected to a well-known AI product.

Our complete ChatGPT app guide explains the different ways people can access ChatGPT.

Can ChatGPT Search the Internet?

ChatGPT can access current online information when web search or other supported browsing features are available and used.

This is important because an AI model's general knowledge and live information are not the same thing.

For example, current information may be needed for:

• Today's news;

• recent product changes;

• live sports information;

• current public office holders;

• prices;

• weather;

• travel information; and

• Newly published research.

Even when ChatGPT searches the web, users should inspect the sources behind important claims.

A cited source can still be outdated, misunderstood or unsuitable for the question.

Is ChatGPT the Same as Google?

No.

ChatGPT and Google Search can sometimes help with similar questions, but they work differently.

A traditional search engine primarily helps users find information across the web.

ChatGPT primarily provides a conversational interface that can explain, generate, organise and work with information.

ChatGPT	Traditional Search
Gives conversational responses	Provides search results
Handles follow-up questions	Often requires new searches
Can rewrite and transform text	Primarily finds existing pages
Can generate ideas	Finds published information
Can analyse uploaded content	Searches indexed web content
Can make mistakes	Search results can also contain unreliable information

For a wider comparison, see our guide to ChatGPT vs Google, Gemini, Claude and Copilot.

The most effective approach is often to use AI and search together.

Use ChatGPT to understand, organise and explore information.

Use reliable sources to verify important facts.

Can ChatGPT Read PDFs?

Yes. ChatGPT can read supported PDF files that you upload to a conversation.

You can ask it to:

• Summarise the document;

• Explain sections;

• extract information;

• compare ideas;

• create questions;

• identify themes; or

• Simplify complex text.

However, the quality of the result can depend on the PDF.

Scanned documents, unusual layouts, handwritten text, complex tables and image-heavy files may be more difficult to interpret accurately.

Users should also think carefully before uploading confidential documents.

Read our dedicated guide to learn more about using ChatGPT to read PDFs.

Can ChatGPT Access Your Computer?

ChatGPT cannot normally access everything on your computer simply because you are having a conversation with it.

It does not automatically have unrestricted access to:

• your files;

• your passwords;

• your folders;

• your browsing activity; or

• Everything is displayed on your screen.

However, this does not mean that ChatGPT can never interact with information from your computer.

You may deliberately:

• upload a file;

• share an image;

• share supported content;

• Use an integration;

• grant permission; or

• Use a feature that allows specific information to be accessed.

The difference between automatic access and user-authorised access is essential.

Our privacy guide explains in more detail whether ChatGPT can access your computer.

Can ChatGPT Access Your Phone?

ChatGPT does not automatically gain access to everything on your phone.

Like other applications, access can depend on:

• the feature being used;

• device permissions;

• information you upload;

• content you deliberately share; and

• Services you choose to connect.

Users should review app permissions and understand why a permission is being requested.

Our full guide answers the question can ChatGPT access my phone?.

Can ChatGPT See Your Browser History?

ChatGPT cannot normally see your complete browser history simply because you open a conversation.

It does not automatically know every website you have visited.

However, information can enter a conversation in other ways. You might paste a link, share text, use a connected feature or deliberately provide information.

For a detailed explanation of the difference between browser history and information you share with an AI service, read can ChatGPT see my browser history?.

Can ChatGPT See Your Camera?

ChatGPT cannot secretly switch on your camera and watch you through an ordinary text conversation.

Camera access depends on the device, application, permissions and feature being used.

If you deliberately use a supported camera or image feature, ChatGPT may be able to analyse the content you choose to provide.

This is very different from permanent, hidden access.

Our complete privacy guide explains when ChatGPT can and cannot see your camera.

Can ChatGPT See Your Screen?

ChatGPT cannot normally see everything on your screen automatically.

In supported situations, a user may choose to:

• Share a screenshot;

• upload an image;

• Use screen sharing;

• use a connected application; or

• Give permission to a specific feature.

Users should understand exactly what is being shared before enabling these functions.

Read our dedicated guide to how ChatGPT screen sharing and screen access work.

Does ChatGPT Save Your Conversations?

ChatGPT may store conversations depending on the service, account settings, product type and controls being used.

Users should not assume that an AI conversation is the same as a private notebook stored only on their own device.

Before entering information, consider whether you would be comfortable sharing it with an online service.

Avoid entering:

• passwords;

• payment card details;

• private security information;

• highly confidential business information;

• sensitive personal documents; or

• Information you do not have permission to share.

Privacy controls and product policies can change, so users should review current settings and official information.

Our detailed guide explains whether ChatGPT saves your conversations.

Is ChatGPT Safe?

ChatGPT can be used safely for many ordinary purposes, but safe use depends on the task, the information being shared, and how much trust is placed in the response.

Important risks include:

• inaccurate answers;

• misleading information;

• privacy mistakes;

• over-reliance on AI;

• inappropriate use;

• scams involving fake AI services; and

• sharing sensitive information.

A useful rule is:

Use ChatGPT as a tool, not as an unquestionable authority.

For low-risk tasks such as brainstorming names or rewriting a paragraph, a small error may not matter greatly.

For medical, legal, financial or safety-critical decisions, an error could have serious consequences.

Our full guide to ChatGPT safety, privacy, security and risks explores these issues in more depth.

Is ChatGPT Safe for Children?

ChatGPT can provide educational and creative benefits, but children need age-appropriate guidance and supervision.

Potential concerns include:

• inaccurate information;

• inappropriate responses;

• excessive reliance on AI;

• sharing personal information;

• reduced independent thinking; and

• Using AI to complete work dishonestly.

Parents and carers should understand how the technology works before deciding how a child should use it.

Useful rules may include:

• never sharing personal information;

• checking important facts;

• telling an adult about worrying content;

• not using AI to communicate with strangers;

• following school rules; and

• Using ChatGPT to support learning rather than avoid it.

Our complete parent’s guide to ChatGPT and children provides more detailed advice.

Can Students Use ChatGPT?

Students can use ChatGPT for many legitimate learning activities.

For example, it can:

• explain a difficult idea;

• create practice questions;

• suggest revision topics;

• Give feedback on writing;

• help plan study sessions;

• provide examples, and

• Act as a conversational study aid.

Problems arise when students submit AI-generated work as their own or use ChatGPT in ways that break school, college or university rules.

A useful distinction is:

Using AI to help you learn is different from using AI to pretend you have learned.

Students should always follow the rules set by their educational institution.

Can ChatGPT Make Mistakes?

Yes.

ChatGPT can produce information that is:

• incorrect;

• incomplete;

• outdated;

• misleading;

• based on a misunderstanding; or

• Presented with too much confidence.

This is one of the most important things every new user should understand.

A fluent answer is not necessarily a factual answer.

AI systems can sometimes generate plausible-sounding information that is wrong. This may include invented quotations, incorrect dates, non-existent sources or inaccurate explanations.

For important information:

1. Ask for sources;

2. open and inspect the sources;

3. compare multiple reliable references;

4. Check publication dates;

5. use primary sources where possible; and

6. Seek professional advice for high-stakes decisions.

What Are the Main Benefits of ChatGPT?

The main benefits of ChatGPT are speed, accessibility, flexibility and conversation.

Speed

ChatGPT can generate ideas or explanations quickly.

Accessibility

Users can ask questions in ordinary language without learning complicated software commands.

Follow-Up Questions

You can continue a conversation and refine an answer.

Adaptability

The same topic can be explained for a beginner, student, expert or child.

Creativity

ChatGPT can help users explore ideas and overcome the difficulty of starting with a blank page.

Productivity

It can assist with repetitive tasks such as summarising, organising and restructuring information.

These benefits explain why people use ChatGPT across work, education, business and everyday life.

What Are the Limitations of ChatGPT?

ChatGPT is powerful, but it has important limitations.

It Does Not Always Know When It Is Wrong

An answer can sound certain even when it is inaccurate.

It Can Misunderstand Your Question

Ambiguous prompts can produce irrelevant answers.

It May Lack Important Context

ChatGPT only knows the information available to it in the conversation and through supported features or tools.

It Cannot Replace Human Responsibility

The user remains responsible for important decisions.

Its Features Change

Advice about ChatGPT can become outdated as models, plans, settings and capabilities evolve.

It Can Encourage Over-Reliance

If users ask AI to do all their thinking, writing and decision-making, they may become less engaged with the task themselves.

The goal should be to use AI to improve human capability, not abandon human judgement.

How to Get Better Answers From ChatGPT

Better prompts usually produce better results.

Try these techniques.

Give Context

Instead of:

“Write an email.”

Try:

“Write a polite email to a customer explaining that their delivery will be two days late.”

Define the Audience

Tell ChatGPT who the answer is for.

For example:

“Explain this for a complete beginner.”

Specify the Format

Ask for:

• a table;

• bullet points;

• a step-by-step guide;

• a short summary, or

• A detailed explanation.

Add Constraints

You can request:

“Keep the answer under 200 words.”

“Use UK English.”

“Do not use technical jargon.”

“Give me three options.”

Ask ChatGPT to Improve Its Answer

Your first prompt does not need to be perfect.

Follow up with:

“What important point did you miss?”

“What are the risks?”

“Give me a stronger version.”

“Check this for possible errors.”

Using ChatGPT effectively is usually an iterative process.

ChatGPT for Work

People use ChatGPT at work to assist with:

• drafting;

• summarising;

• brainstorming;

• meeting preparation;

• research;

• data interpretation;

• planning;

• coding; and

• communication.

However, employees should follow workplace policies.

Confidential company information should not be entered into an AI system without

authorisation.

Organisations should create clear rules covering:

• approved tools;

• acceptable data;

• human review;

• security;

• copyright;

• accuracy; and

• accountability.

ChatGPT for Business

Businesses use conversational AI for many different purposes.

Potential applications include:

• customer support;

• marketing ideas;

• research;

• internal knowledge;

• document drafting;

• product development;

• training; and

• productivity.

Entrepreneurs also use AI to explore new business opportunities. Our guide to ChatGPT business applications in the UK examines some of these uses.

People interested in income opportunities can also read our guide to ways beginners are using ChatGPT to make money.

AI does not automatically create a successful business. Skills, customers, judgement, execution and trust still matter.

Is ChatGPT Replacing Search Engines?

ChatGPT is changing how people find and understand information, but it has not made traditional search unnecessary.

People may prefer ChatGPT when they want:

• a direct explanation;

• a summary;

• help thinking through a problem;

• personalised guidance; or

• a conversational experience.

They may prefer traditional search when they want:

• specific websites;

• local businesses;

• shopping results;

• a wide range of sources;

• breaking information; or

• Direct access to original pages.

The future of information discovery is likely to involve both conversational AI and traditional search technologies.

Is ChatGPT the Best AI Assistant?

There is no single AI assistant that is best for every user and every task.

Different AI systems may perform better at:

• writing;

• coding;

• research;

• search;

• long documents;

• integration with other software; or

• creative tasks.

The best choice depends on what you need.

Our detailed comparison of ChatGPT, Google Gemini, Claude and Microsoft Copilot can help users understand the main differences.

The Future of ChatGPT

ChatGPT has developed rapidly since its public launch.

The direction of travel suggests that AI assistants will become increasingly capable of working across:

• text;

• voice;

• images;

• documents;

• software;

• online information; and

• connected services.

However, increased capability also creates important questions about:

• privacy;

• employment;

• education;

• copyright;

• misinformation;

• security;

• human skills; and

• responsibility.

The future of ChatGPT will not be determined only by what the technology can do.

It will also depend on how people, businesses, schools and governments choose to use it.

Read our wider analysis of ChatGPT and the future of artificial intelligence for more on how these technologies may continue to develop.

Frequently Asked Questions About ChatGPT

What is ChatGPT in simple terms?

ChatGPT is an artificial intelligence assistant that you can talk to using ordinary language. It can answer questions, explain subjects, help with writing, analyse information and assist with many different tasks.

What does ChatGPT stand for?

ChatGPT combines “Chat” with “GPT”, which stands for Generative Pre-trained Transformer.

Who owns ChatGPT?

ChatGPT was created by OpenAI.

Is ChatGPT free to use?

Yes. A free version of ChatGPT is available. Paid options can provide different features, capabilities and usage limits.

Can ChatGPT answer any question?

You can ask ChatGPT about many subjects, but it may not answer every request. Some requests may be limited for safety reasons, and some questions may require information or expertise that ChatGPT cannot reliably provide.

Is everything ChatGPT says true?

No. ChatGPT can make mistakes and generate incorrect information. Important claims should be verified.

Can ChatGPT see my computer?

ChatGPT cannot normally see everything on your computer automatically. It may be able to analyse content that you deliberately upload, share or make available through a supported feature.

Can ChatGPT see my phone?

ChatGPT does not automatically have access to everything on your phone. Access depends on the permissions, features and content you choose to use or share.

Can ChatGPT see my browser history?

ChatGPT cannot normally see your complete browser history simply because you are chatting with it.

Can ChatGPT see through my camera?

Not through an ordinary text conversation. Camera access depends on the device, permissions and specific features you deliberately use.

Does ChatGPT save conversations?

Conversation storage can depend on the service, settings and product being used. Users should review current privacy controls and avoid sharing highly sensitive information unnecessarily.

Can ChatGPT read PDF files?

Yes. ChatGPT can analyse supported PDF files that users upload.

Can ChatGPT write essays?

ChatGPT can help generate and improve written content. Students must follow the rules of their school, college or university and should not submit AI-generated work dishonestly.

Can ChatGPT replace Google?

No. ChatGPT and traditional search engines have overlapping uses but different strengths.

Can ChatGPT replace people?

ChatGPT can automate or assist with some tasks, but it does not replace human responsibility, experience, relationships, judgement or accountability.

Is ChatGPT safe?

ChatGPT can be used safely for many everyday tasks, but users should protect personal information, verify important answers and avoid relying on AI for decisions that require qualified professional judgement.

Final Thoughts on ChatGPT

ChatGPT is one of the most significant consumer artificial intelligence technologies of the modern era.

Its importance comes not from one single feature, but from the fact that it makes advanced AI accessible through ordinary conversation.

A beginner can ask a question.

A student can request an explanation.

A writer can improve a draft.

A programmer can explore code.

A business owner can brainstorm ideas.

A user can upload a document and ask questions about it.

But ChatGPT is not perfect.

It can misunderstand questions, make factual mistakes and produce answers that sound more certain than they should. It should be used with curiosity and critical thinking.

The best way to use ChatGPT is not to trust everything it says and not to fear everything it can do.

Understand the technology.

Protect your information.

Check important facts.

Use human judgement.

And treat artificial intelligence as a powerful tool that works best when people remain actively involved.

For more independent guides, tutorials, privacy information and the latest developments, explore the latest articles on WhatIsChatGPT.co.uk.