Tag proposal number 3:
Upvote if you agree, downvote if you disagree, or answer if there are additional considerations.
group-work is potentially larger than group-assignments in scope while including it. I don't see the need to choose between assignments and other "work", such as in-class exercises and such, when tagging a question. The question itself can delineate the conditions between them. From an educational perspective I think the dynamics and results are sufficiently similar to tag all such questions together.