A pretty simple discussion-style question for those that know more about the [apparently] relevant technologies than I do: what is the purpose of the active tag on Stack Overflow? Why does it exist in the first place, and should it continue to exist?
There's no tag wiki information, so it's all just guesses as to its intended purpose. If it has a purpose, creating this would be a good start.
There are a reasonable number of questions that currently carry this tag (582 at the time of this writing), so I don't feel comfortable making the unilateral decision to pursue its burnination.
But that number could be explained by inertia—the tag exists, so it is suggested/accepted for new questions/users, and thus people continue using it. But the real mind-boggler is that it has 20 followers. Who follows the "activity" tag? Who is an expert in the subject of activity/activities?