This feature gives the ability for the drivers to check themselves in and out of the dispatch screen. This will also track on the admin back end what time the drivers start and end their shifts for management tracking.
You must first assign a default location to your drivers. You can't do it from the Driver Management section you have to search users for each driver then choose a default location for them.
Please note that if you are having an issue with this, please check through this Yammer post to see if it helps: https://www.yammer.com/bigtreesolutions.com/#/Threads/show?threadId=715588763&scoring=linear1Y-prankie-group-private-higher&match=any-exact&search_sort=relevance&page=1&search=teamwork&search_origin=global&trk_event=search_click&trk_result_index=0&trk_entity_model=Message&trk_entity_id=715588763