A dashboard is built by adding widgets and pointing each one at a board, a column, and a calculation, a sum, a count, an average, a status breakdown. Widgets can pull from multiple boards at once if they're connected, which is how most teams build a cross-project rollup without leaving monday.com.
The Activity Log, a separate feature from dashboards, tracks every change made to a board, who edited what and when, useful for auditing or catching an accidental edit after the fact rather than for ongoing reporting.
All of this reads from board data that's directly queryable through monday's API too, so if you need the same numbers somewhere other than a dashboard widget, a scheduled report, a BI tool, nothing's actually blocking that at the data level.