I use this Group feature in other apps in a slightly different way. I’m not trying to tag or simply coategorize contacts, I’m trying to communicate with them. For example, each season, I want to group my Academy coaches, my Transition Academy coaches, my Recreation coaches, my volunteers, etc. As I have issues for each, I don’t want to have to remember to add everyone before I send them a note. I want a group for each that I can send information to, then track thay they’ve received it and see their replies.
As some have said above, contacts can exist in more than one group simultaneously. The key for me is easy <one-click> communication.