The conflicts tag seems to be getting used for a number of different questions. It primarily seems to be used to refer to situations in Fate/Fate Core, but is also tagged on a few questions about Polaris, Mouse Guard, Dogs in the Vineyard, and some other systems.
However, the tag also seems to be getting used on some questions to refer to conflicts outside of a game.
If it's meant to refer to a specific in-game mechanic in certain RPGs, it's possible it fills a niche that isn't already covered by party, player-vs-player, betrayal, and similar tags. That said, it seems like it might refer to either different mechanics in the various systems (which might warrant separate tags), or more generally to all sorts of in-character conflict (...which seems quite broad).
The use of the tag for out-of-game conflict seems more questionable, as there seems to be much more potential overlap with tags like group-dynamics, social-contract, social, problem-players/problem-gm, etc. (Of course, none of these is totally identical to the scope of "any out-of-game conflict", which also seems quite broad.)
The usage guidance for conflicts suggests that it's the former:
In-game conflicts can be social, physical, or any other realm of conflict. In some game systems, conflicts are the smallest unit of mechanical resolution.
It doesn't clearly state that the tag is only to be used for in-game conflict, though perhaps that's meant to be assumed by its failure to mention out-of-game conflict. If it is meant to refer to only in-game conflict, perhaps the usage guidance should be made more explicit so the tag isn't added to irrelevant questions.
When should the conflicts tag be used? Does it have a clear scope distinct from that of other tags?