Prompt engineering focuses on how users interact with AI models by crafting input (prompts) that guide the output behavior. At its core, this skill explores how the structure, wording, and formatting of prompts can significantly affect the results returned by large language models. It provides users with practical techniques to phrase questions, give context, and evaluate output — all without needing to understand the internal mechanics of the models. The skill includes key strategies to refine outputs and avoid common mistakes in prompt usage.