What is the source reports per widget?

Exactly one; widgets can use different reports.

What is the widget types?

Chart, gauge, metric, table, text, image.

Up to 25, max 20 charts and tables.

5 per dashboard, 50 values per filter.

Not applied to subscription or scheduled emails.

Enterprise 5, Unlimited and Performance 10, Developer 3.

Dashboards: widgets, running user and refresh | Platform Administrator Study Guide

Fact	Detail	Source
Source reports per widget	Exactly one; widgets can use different reports	Build a Dashboard (opens in a new tab)
Widget types	Chart, gauge, metric, table, text, image	Build a Dashboard (opens in a new tab)
Widgets per dashboard	Up to 25, max 20 charts and tables	Dashboard Limits (opens in a new tab)
Dashboard filters	5 per dashboard, 50 values per filter	Filter a Dashboard (opens in a new tab)Dashboard Limits (opens in a new tab)
Filters in emails	Not applied to subscription or scheduled emails	Filter a Dashboard (opens in a new tab)Schedule a Dashboard Refresh (opens in a new tab)
Dynamic dashboard cap	Enterprise 5, Unlimited and Performance 10, Developer 3	Dynamic Dashboards (opens in a new tab)
Dynamic dashboard refresh	Manual only, no subscription	Dynamic Dashboards (opens in a new tab)
Dynamic dashboard folder	Not a private folder	Dynamic Dashboards (opens in a new tab)
Choose running user	View My Team's Dashboards or View All Data	Dashboard Data Visibility (opens in a new tab)
Refresh cooldown	Refresh within 1 minute of the last is ignored	Refresh Dashboard Data (opens in a new tab)
Lightning scheduled refresh	Through a dashboard subscription	Subscribe to Dashboards (opens in a new tab)
Subscriptions per user	15 dashboards in Unlimited, 7 elsewhere	Dashboard Limits (opens in a new tab)