Is there any value in the tag correction? Currently 87 questions are infected with that hideous tag.
Since unspecified proofreading is off-topic I don't think this should be used as tag anywhere. We already have grammaticality, orthography & punctuation for the usual suspects regarding corrections. Naturally, there is no usage guide whatsoever.
Following the guideline from Meta.SE on burninating I answer the following questions:
Does it describe the contents of the questions to which it is applied? and is it unambiguous?
Of course not, we have no idea what should be corrected.
Is the concept described even on-topic for the site?
Depends, but we do have specific tags for the different areas of possible corrections and specifying the concern is mandatory.
Does the tag add any meaningful information to the post?
Other than a disregard for existing and more used tags? No.
Does it mean the same thing in all common contexts?
Not really, it can everything from acceptable questions to a lazy cop-out homework/proofreading replacement.
Let's get rid of it.
Edit 07.11.2016: After +4/-4 votes and a tumbleweed badge (yay!) I would love to hear from the down voters what merit they do see in the tag.
Edit 24.11.2016: I started removing the tag after reaching net +6. We are now down to 75 questions and I encourage everyone to pitch in.
Edit 03.12.2016: The questions have all been edited in a community effort. The nightly roomba should take care of the rest.