This tag has (only) 4 questions and is only recently created (early March).
specialabilities seems useless and should be removed.
Can we burninate this tag?
I agree. The tag should be removed. Of the 4 questions it is attached to (one of which is closed), 3 would be better categorized by monsters and the fourth apparently tries to apply it to spell effects which falls under spells. Additionally it seems like an unnecessary and confusing tag to even have (without really coming up with a narrow definition), after all what isn't a special ability in D&D 5e for example?
The tag name is formatted incorrectly as well.
For, all the reasons above, I say let it burn.
Update: Tag has been removed by @ObliviousSage and is no longer special.