GroupType

The GroupType is used to indicate the type of ad grouping that an event takes place either within or upon.

Value	Description
0	No group. This is the default if an event does not take place in the context of a group
1	Category. This indicates that an event takes place either: To an ad while the list of ads was filtered by category, or To a category itself (such as clicking on a category)
2	Collection. This indicates that an event takes place either: To an ad after the user has clicked into a collection, or To a collection itself (such as clicking on a collection)