Group @mentions
Good idea here from Richard M:
Being able to assign members into a group and @mention (notify) the entire group at once of a discussion they might want to respond to and participate in is a powerful tool.
You can assign newcomers to cohorts and invite the entire cohort to introduce themselves without having to tag each person in individually.
You can create groups for experts in specific areas and @mention people in that group when a relevant discussion comes up.
You can create an @mention group for your top members and use it to draw attention to unanswered questions.
Etc…