A prompt template is a reusable, parameterised instruction for a language model, a proven wording you fill in and reuse, rather than writing the prompt from scratch each time.
The wording of a prompt has a large effect on the result. A prompt template captures a version that works, the right framing, constraints and examples, with placeholders for the specifics. Reuse it and you get consistent output without rediscovering the phrasing every time.
Templates cover everything from teaching prompts and code-review rubrics to brand-voice and structured-extraction prompts. The best ones are specific about the task, the format they expect back, and the failure modes to avoid.
They're the lightest thing in the ecosystem to adopt, copy, fill in, run, and a good starting point before reaching for a skill or an agent.
A template is text you paste into a model. A skill is packaged and installable, and an agent loads it automatically. Templates are the simplest, most portable option.