Organizations can request the "Activity Log Digest" option to be enabled.
This will allow organizations to configure their Security Groups to enable an Activity Log to be emailed.
Individual users can then opt-in to have the Activity Log Digest emailed to them.
This is a daily email that will notify the user of all activity that has been completed for users that they have access to, depending on the Scope in their Security Group privilege's (Self, Team members, Everyone).