Hi ,
In addition to Adhiyan, here is the exhaustive list.

This is URL type is used as a classification to divide all tracking information into meaningful segments, you can add more to this enumeration like If you are using we-chat, line and other modules then there will be more values in this list. Moreover, you can add your third-party tracking to this list, second, Case if you have more than one brands then you have to have a brand+web and another tracking classifications to get information per brand basis.
Hope this helps!
Regards,
Amit