Well I have time, I do not know a lot of the tags beneficts but it looks important for correctly search for information.
Lots of examples where they are not correctly tagged when we talk about geology.
Should I edit the posts to correctly classify the info?
The trouble I see is my editions would need to be reviewed and some ancient questions will appear at active list if I review them.
I wonder too if I should add tags that are deduced from the answer and not from the question. (Imagine "What is this? I tag is as geology "It is a rock, then tagged as petrology too).