The Bulk Actions area is where you can view ongoing and past bulk action operations, seeing their given name/label, what type of bulk action they were, the status, who initiated the action, and when. You can also use filters to look for specific bulk action by time, type, status, and user.
You can also use the show stats button to get a more detailed view of the execution of the bulk action, including seeing success rates, any errors, and getting more detailed information for specific types of bulk actions such as emails or texts (which will show delivery rates, bounce rates, open rates, etc.).