What a role does
A role tells the AI which point of view to answer from. "You are a nurse" and "You are a comedy writer" lead to very different answers about the same topic. The role shapes which details it picks, which words it uses and what it treats as important.
You will see a role at the start of almost every prompt in our library. It is the first of the five parts of a prompt, and often the quickest win.
Make the role specific
"You are an expert" does very little. Expert in what, and for whom? A strong role says three things: the job, who they help and how they work.
Before
You are an expert. Help me with my resume.
After
You are a hiring manager at a busy restaurant group who reads dozens of resumes every week and knows what makes you call someone back. Read my resume for a kitchen manager job and tell me the 3 changes that would most improve my chances.
The second role has a point of view. It knows what it wants to see, so it can tell you what is missing.
| Instead of | Try |
|---|---|
| You are a writer. | You are a children's author who writes calm bedtime stories for ages 4 to 6. |
| You are a fitness expert. | You are a patient personal trainer who works with beginners over 50. |
| You are a marketer. | You are the owner of a small bakery who writes friendly, honest posts for regulars. |
| You are a teacher. | You are a tutor who never gives the answer, only hints, one at a time. |
When a role helps most
- Tone and voice. A role is a fast way to set how the answer sounds: a calm coach, a blunt editor, a cheerful host.
- Feedback. Ask the AI to read your work as the person who will judge it, like a hiring manager, a customer or a teacher grading the essay.
- Practice. Have it play a part so you can rehearse a hard talk with a tough customer, a landlord or an interviewer. The assistant instructions tool can set up a helper that keeps its role in every chat.
- Explaining. "You are a patient teacher for a 12 year old" keeps answers simple.
What a role cannot do
A role changes how the AI answers. It does not give it new facts. Calling it a doctor does not make its health advice safe, and calling it a lawyer does not make its answer legal advice. Treat what it says like any AI answer, and check the facts that matter.
A role also cannot fix a vague request. "You are a famous chef. Make dinner." still leaves out who is eating, what food you have and how much time you have. The role is one line. The rest of your prompt still does most of the work.
Try two roles for a second opinion
Here is a handy trick: ask two roles the same thing, then compare. A hard choice looks different to a careful planner and a bold one. A new menu looks different to a loyal customer and a first-time visitor.
You are two advisors with different views: a careful one who looks for risks, and a bold one who looks for chances to grow. Here is my decision: [the choice you are facing] What matters most to me: [your top 2 priorities] Give me each advisor's view in 3 short bullets. Then tell me where they agree, and the one question I should answer to decide.
Not sure which role to use? Ask the AI: "What kind of expert would be best at this job, and why?" Then use its answer as your role line.