The other day I found out that the action-economy tag exists. And upon looking further, it currently exists only on 14 questions (now 17, with 2 having been added to questions by other users), some of which also have the actions tag, some of which do not. One thing I found particularly interesting is that there are exactly two questions tagged with action-economy that are marked as duplicates, and it just so happens that none of their marked duplicates (there are four) also have this tag.
Is the spell combo Booming Blade into a quickened Thunderwave legal?
Is it possible to take multiple bonus actions in a single turn?
Their current (as of writing) tag descriptions are provided below:
For questions involving the rules that apply to taking a certain action in a specified system.
For questions centering around the "action economy", a meta-game term for the inherent limits on the number of things a character can do in a single turn.
In turn-based games, action economy might involve taking extra actions because of a feature, using less time to perform some action, taking actions for all of your summoned monsters, and so on.
I'm simply unsure when this tag is meant to be used and how it's been being used also doesn't make great sense to me. How exactly do the actions and action-economy tags differ and how should they be used?