The Activity Log gives you the ability to track activities happening through your user profile, collective or fiscal host.
You can access your Activity log via your Account Settings, Collective Settings or Fiscal Host Settings.
Click on Activity log within your settings
Step 4 screenshot
You can then filter the activity by Period or Activity.
When viewing from a Fiscal Host account, you can also filter by Account. This allows you to view the activity of your fiscal host, all of your hosted collectives or a specific collective.