For anyone creating a new Crowdfunding and Peer to Peer Fundraising, this feature has mostly been absorbed into the existing designs, and as such, is no longer functional.
Team Categories refer to a feature that was part of an older design of Crowdfunding and Peer to Peer Fundraising's Fundraising Page, which has now mostly been phased out. It is still part of the list of choices because a few clients still have active Crowdfunding and Peer to Peer Fundraising activities on that older design, and need access to make Team Category changes.
Mostly, this can be ignored.