ChatGPT lets you ask a question or describe a task in everyday language. You can use it to explore an idea, draft an email, understand an unfamiliar topic or work through a problem step by step.
It can feel remarkably natural to use. You ask a question, read the answer and continue the conversation if you need more help. Understanding how it produces those answers will help you use it confidently and recognise when you need to check its work.
What is ChatGPT?
ChatGPT is an AI assistant powered by large language models. A language model is trained to work with patterns in text and other information, allowing it to generate a response to what you ask.
You might ask for a simple explanation, a list of ideas or help improving something you have written. ChatGPT uses your request and the relevant conversation to produce a response. You can then ask it to clarify, shorten or change that response.
Depending on the tools available, ChatGPT can also do more than generate an answer from its training. For example, it may search the web for current information and provide links to sources. When it does, it is useful to open those sources and check what they actually say.
How does it generate an answer?
During training, a language model processes large amounts of information and adjusts how it predicts parts of a response. It is not usually selecting a complete, ready-made answer from a database each time you ask a question. It generates its response as the conversation unfolds.
Your phone’s predictive text offers a very simple comparison: it suggests what might come next based on what has already been typed. ChatGPT works at a far more complex level. It can take account of a question, the surrounding conversation and the form of answer you requested.
That is why it can explain the same subject in several ways. Ask it to explain inflation to an adult and then to a child, and it can change the language and examples while addressing the same topic. openai.com
Why does it sometimes sound so certain?
ChatGPT is designed to give useful, readable responses. Its fluency can make an answer sound convincing even when a fact is wrong, a source is missing or the question has been misunderstood.
This is sometimes called a hallucination. It means the tool has produced information that appears plausible but is inaccurate or unsupported. A polished answer is therefore a starting point for checking, not proof that the answer is correct. openai.com
If you need a recent fact, ask ChatGPT to search for current sources when that option is available. If the answer affects your health, money, legal position or an important decision at work, check it against a reliable source or a qualified professional.
What does ChatGPT remember?
Within a conversation, ChatGPT can use earlier messages to understand a follow-up question. If you ask it to shorten an email it has just drafted, you do not need to paste the email again.
Some ChatGPT settings also allow it to use saved memories or information from previous chats to make future responses more relevant. Those settings differ from simply keeping track of the conversation you are having now. You can review the memory controls in ChatGPT’s settings. help.openai.com
Before entering personal, confidential or customer information, consider whether the tool is appropriate for that information and check the privacy settings available to you.
How can you get a better answer?
You do not need a complicated formula. Tell ChatGPT what you are trying to do, who the answer is for and how you would like it presented.
For example, instead of writing “Explain inflation”, try:
“Explain inflation to someone who has never studied economics. Use a supermarket example and keep the answer under 150 words.”
If the response misses the point, say so. You might ask, “Can you make that simpler?” or “Which part of your answer should I verify?” A conversation often works better than expecting the perfect answer from one request.
Try it yourself
Choose a subject you would like to understand and ask ChatGPT for a short explanation. Then follow up with:
“Give me an everyday example.”
Finally, ask:
“What might be misleading or incomplete about that explanation?”
Compare the responses. Notice how your follow-up questions can improve the answer and help you think more carefully about it.
Key takeaway
ChatGPT generates responses to your requests and can adapt them as you continue the conversation. It may also use tools, such as web search, to help with current information when those tools are available.
Its strengths include explaining, drafting and helping you explore ideas. Its weakness is that a convincing answer can still be wrong. Give it clear instructions, ask follow-up questions and check important claims before relying on them.
In the next lesson, you will try an AI tool for yourself and use a simple request to complete a practical task.