Every task run and runbook session is documented in the Activity page, available from the top navbar. By default, the runs page displays an audit log showing a summary every task your teammates have run in reverse chronological order:
Only runs and sessions you have access to will be shown here. Team admins can see all runs.
You can filter the runs to focus on tasks or schedules of interest in a certain date range.
The same can be done with runbook sessions:
Clicking on a run pulls up the run results page which shows complete run metadata, formatted output, and log output: