KPI Dashboard Design Prompt

Help me design a KPI dashboard for [FUNCTION — e.g. sales team, marketing department, customer support].

Audience: [who will look at this dashboard? What decisions do they make?]
Update frequency: [daily, weekly, monthly?]
Data sources available: [list what you have access to]

Please define:
1. The 5–8 most important metrics this dashboard should show (with definitions)
2. For each metric: how to calculate it, what 'good' looks like, and what action it should trigger
3. Recommended layout (what goes at the top, what's secondary)
4. What to cut — common metrics that look good but don't drive decisions