This is the section Groups and Sorting:

 

 

​Here you can create a new group by clicking on the Add a group button. For that, you then enter a field and a sort order and tick Show header or Show footer in case you want to display them. To add a sort(ing) go on the particular button. If you selected a group or a sorting in the list you can remove it by clicking on Delete. You can also change the order of the groups and sortings with the Move up and Move down buttons.

 

The group and sorting feature is needed when you add a list of information, for example products, and then want to group it by product type and sort it by their names. This feature is best for product catalogs or offers.