The Activity Log provides you with an overview about the changes within your vene dash instance. You can find the Activity log inside of the user icon at the top right under "Activity Log"

Inside the Activity Log, you'll have the overview of the latest changes inside your vene dash instance according to the time frame selected. User the filters to search for specific requirements. 

Clicking on the ">" icon will open up more details for this specific timestamp, giving more details for example has been changed.