KPI Dashboard Design

Help me design a KPI dashboard for {{function_e_g_sales_team_marketing_depart}}.

Audience: {{who_will_look_at_this_dashboard_what_dec}}
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

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