The Vendor Export Log is where all major activities that effect that Vendor can be found. The Vendor Activity Log is split up into three columns:

Log Date - This will be the date and time (set in Coordinated Universal Time, UTC) of the activity.

Activity Type - What type of activity occurred such as Relationship Status Change, Deletion of Audit Review, Addition of a New Vendor, etc. 

Activity Details - This will specify what occurred because of the activity. This will explain if a Vendor was switched to inactive, or if an Audit Review was added, what information was chosen. 

Here is an example of a Vendor Activity Log: