The quality of being easy to understand, precise, and unambiguous in a prompt.
Clarity means the model can tell what the user wants without having to guess. Clear prompts reduce the chance of irrelevant output, inconsistent structure, or misunderstandings about the task.
In practice, clarity comes from explicit wording, defined objectives, and concrete constraints. A clear prompt tells the model what to do, what to avoid, and what a successful answer should look like.
Clarity is closely related to specificity, but they are not identical. Specificity narrows the request, while clarity makes the request understandable and interpretable.