Writing your first prompt

In this guide, you will learn what a prompt is and how to write your first one so the AI gives you something genuinely useful.

A prompt is the message you send to an AI to tell it what you want. To write a good first one, describe your task in full sentences, as if briefing a helpful colleague: say who it is for, give a few useful details, and state what a good answer looks like. That context is what turns a generic reply into a useful one.

What is a prompt?

Every time you type a message to an AI and press send, you have written a prompt. The message you give an AI to tell it what you want is called a prompt, and it is the single most important thing you can get good at.

A helpful way to picture it: you are briefing a very capable but very literal assistant. This assistant has read an enormous amount and can write about almost anything, but it only knows what you tell it in the moment. It cannot see your screen, read your mind, or guess the bits you left out. It works with exactly what you give it.

Underneath, the tool doing the writing is a large language model, which responds by predicting the words that best fit your request. The clearer your request, the better that prediction turns out. That is the whole game, and it is more within your reach than it might sound.

Why full sentences beat keywords

Most of us come to AI from years of using search engines, where you type a few keywords and scan the results. It is a hard habit to shake, but AI rewards the opposite approach.

Compare these two ways of asking for the same thing. First, the search-engine way:

gift ideas dad birthday

You will get something back, but it will be generic, because you have given the AI almost nothing to work with. Now the briefing way:

Help me think of birthday gift ideas for my dad. He's turning 60, he
loves gardening and old jazz records, and I'd like to spend around £40.
Suggest five ideas and say why each one suits him.

The second version gives far better answers, and not because the AI is trying harder. You have handed it the details it needs: who the gift is for, what he likes, your budget, and exactly how you want the answer laid out.

Try it yourself

Let’s write a real one together. Think of a small task you would genuinely find useful, then write it out as full sentences, as if explaining it to a helpful colleague. Here is a template to get you going:

I need help with [your task]. Here's what you should know: [a couple of
useful details]. Please give me [what you want back, and how long].

Filled in, it might look like this:

I need help writing a message to cancel my gym membership. Here's what
you should know: I've been a member for two years, the service has been
fine, and I just can't fit it in any more. Please write a short, polite
message I can send by email.

Send it, read the answer, and notice how much the AI picked up from your details. If you got something you could actually use, you have already grasped the core skill.

A common first instinct

A common first instinct is to keep prompts as short as possible, as though you are saving the AI some effort. You will get better results if you do the opposite: tell it who the answer is for, what you are trying to achieve, and what a good response looks like. There is no prize for brevity here. A few extra sentences of context almost always pays you back in a better answer.

Next steps

You can now write a clear, useful prompt, which is a bigger deal than it might feel like. Next, we will give your prompts a reliable shape so they work well every time, in structuring your prompts.