Prompting

A prompt is the instruction and context you hand a model. Prompting is the practice of writing that well: stating the task clearly, giving the model the facts it needs, showing an example or two, and setting the format you want back. Small wording changes can move the answer a lot.

In information terms, a good prompt lowers the uncertainty the model has to resolve before it answers. The less it has to guess, the more reliable and cheaper the result. It is the cheapest lever most teams have, and the most overlooked.