Notify User when item reshared inside the organization
There's this Set-SPOTenant powershell Parameter NotifyOwnersWhenItemsReshared, but the User only gets notified when a document is shared with a user outside the organization. A Microsoft Support call also confirmed this to be working as designed". Please make it also possible to be notified when a document is shared internally, so the owner of the document always has a overview who has Access to a file without having to look it up by himself.
Tracking analytics is essential when trying to influence behavior across a system and being able to see what generates the most VIEWS and SHARES is essential. There is a reason why FACEBOOK tracks this so closely.