Simple definition
Prompt engineering structures instructions and context to improve an AI model's responses for a particular task.
Purpose and use
Prompt engineering designs and evaluates how instructions, context and examples are supplied for a task.
How does it work?
It can structure output requirements, clarify criteria or provide examples, then compare results against a reference.
Example and verification
Before choosing a variant, evaluate the same request set and measure errors that matter to the use case.
Points to watch
Wording that succeeds in a few demonstrations can fail elsewhere or after a model change. It cannot fix every data or tooling limitation.
In short
Useful work combines input design with repeatable evaluation rather than searching for a supposedly universal phrase.