Task Groups are a new way to view the work on your Boards. It works across all the views including Board, Plan and Table view.
Task Groups are available in Taskfeed Summer '18 versions 13.28 and above.
If your Org does not have the most up to date version of Taskfeed, please contact your Salesforce Administrator or firstname.lastname@example.org.
Group and sort Tasks on your Board by:
Group tasks in any of the views: the Board View, the Plan View, the Due Date View or the Table View.