What the draconic-bloodline is about? Is it relevant? Should we burninate it?
If not, can we do a tag wiki on it?
Draconic Bloodline is like a subclass of sorcerer in Pathfinder and D&D 5e. Having a tag for this is kind of like having the tags [archfey-pact], [the-fiend-pact], and [the-great-old-one-pact] for the different kinds of core D&D 5e warlock subclasses — which is to say, it's a little bit odd for this tag to exist.
I don't think it's a good or useful tag; of the questions currently bearing it…
I don't think past usage demonstrates any value to the tag, and looking at analogies to parallel D&D/PF concepts shows that we simply don't have tags for that sort of thing — such as the various D&D 5e Warlock Pacts, or the Eldritch Knight subclass, or whatever.
All these questions could be tagged sorcerer just fine.
I think draconic-bloodline should just be merged with sorcerer. That would make all questions currently using the tag get a sorcerer-related tag relevant to all five questions, and eliminate a tag that's pretty useless. (And by merging with mod tools, we'd avoid question-bumping edits.) And by merging them without also synonymising them, the draconic-bloodline tag stays possible to re-create if it should ever actually be useful. As doppelgreener pointed out, the current minimal usage suggest a redirection isn't needed to help people find the sorcerer tag.
* Labelling background info is nearly always a harmful use for a tag, since it pollutes the search results with irrelevant questions.
5 questions about a class feature that is endemic to D&D is not much, but it is a rather complicated and wide spectum one. while it is not necessary much, we do have wild-shape (166 questions) - thus I vote to stay for the time...