What Is a Prompt?

Take a breath — this chapter is written to be read like a conversation, not a textbook, so it's easy to follow.

Let's Think About It for a Second

A model can't read your mind. It's a confident guesser — a bright junior who'll happily run with whatever you hand it. A prompt is that instruction. "Write something good" isn't a prompt yet. "5 sentences for a student's notes, no hard vocabulary, include one example" is. Vibe coding asks it to write code. An agent asks it to use tools. RAG asks it to search your notes. A prompt is the mouth for all three — mumble, and the feet don't know which way to walk.

Connect It to Everyday Life

Bad question — "explain photosynthesis." Good question — "explain photosynthesis in 6 sentences for a 14-year-old. Add one example. No exam jargon." The second one has a goal, an audience, a length, a shape. At a restaurant, saying "make something good" tells the kitchen nothing. "Fish, not spicy, less rice" gets you closer.

A prompt is a short instruction
The job matters more than fancy wording
Clear gets you close; fuzzy gets you a guess

Let's Try It Together

text

Fuzzy:  explain it well
Clear:  6 sentences, for a 14-year-old
        include 1 example
        no exam vocabulary

You should see

You can explain a prompt as a short instruction.

Try It in 5 Minutes

Write 3 questions you've actually asked an AI before. For each, note "fuzzy" or "clear" and why.

A Quick Heads-Up

Pretty wording doesn't make the job clear. "What to do" matters more than "please, kindly."