Does "/cc @johndoe" do something that I'm missing? (The "/cc" part is irrelevant of course, but specifically tagging someone.) I have yet to figure out what i

Does "/cc @johndoe" do something that I'm missing? (The "/cc" part is irrelevant of course, but specifically tagging someone.) I have yet to figure out what it accomplishes in terms of notifications or queries, seemingly very little. But for all I know there might be something I'm missing, or a setting that could be adjusted? (Edit: maybe it seems superfluous because I typically want notifications for everything in the repositories that I have greatest interest in)