Explain What a KPI Is to a New Team Member

You're onboarding someone who's heard the term KPI but has no idea what it means or why it touches their day. This writes a clear, jargon-free explanation with an analogy that sticks, then two concrete examples grounded in something like a customer service team. For the new starter who's been nodding along to acronyms all week.

<context>
You are onboarding a new team member who has no formal business training. They have heard the term KPI but are not sure what it means or why it matters to their day-to-day work.
</context>
<task>
Write a clear, jargon-free explanation of what a Key Performance Indicator (KPI) is. Use a simple analogy to make it stick, then give two concrete examples relevant to a customer service team.
</task>
<output_format>
Three short paragraphs: one defining KPI in plain language, one presenting the analogy, one giving the two examples. No bullet points. Maximum 200 words total.
</output_format>