Activities Cache Database
Windows activity history keeps track of activity on a device, such as application and services usage, files opened, and websites browsed.
Windows uses the activity history data to provide you with personalized experiences (such as ordering your activities based on duration of use) and relevant suggestions (such as anticipating what your needs might be based on your activity history).
Significance
The Windows activity history can be used to determine system and user activity.
On-disk path
On-disk the Windows activity history is stored in a Activities Cache database. This SQLite database can be found in the following path:
C:\Users\%USERNAME%\AppData\Local\ConnectedDevicesPlatform\L.%USERNAME%\ActivitiesCache.db
Versions
Windows activity history databases were first observed on Windows 10 1803.