It's not a search query, it's an instruction
A prompt is the text you feed into a language model to steer what it produces next. It is easy to treat a prompt like a Google search, typing a few keywords and hoping the model figures out what you want. But a model like GPT-4o, Claude, or Gemini isn't retrieving a matching document, it's predicting the most likely next words given everything you wrote. That means every word in your prompt shapes the probability of what comes out, not just the topic you mention.
This is why two people can ask an AI about the same subject and get wildly different quality answers. One writes 'tell me about marketing' and gets generic filler. The other writes 'you are a marketing strategist for a 10-person SaaS startup with a $2k/month ad budget, suggest 3 channels and explain the tradeoffs' and gets something they can actually act on. The model didn't get smarter between those two prompts. The instructions did.