How to Write Clear, Effective Prompts

The single biggest factor in getting useful output from an AI is the quality of your input. A vague, ambiguous prompt will produce a vague, generic response. A clear, specific prompt — one that tells the model exactly what you want, in what format, for what purpose — will produce dramatically better results.

This is not a matter of finding secret keywords or magic phrases. It is about communicating clearly. If you can explain what you want to a reasonably intelligent colleague, you can write a good prompt.

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Why Vague Prompts Get Vague Answers

Remember from Lesson 1 that LLMs predict the most likely continuation of your text. If your prompt is vague, there are thousands of possible valid continuations. The model will pick one — but it might not be the one you wanted.

Example: A Weak Prompt

"Tell me about climate change."