On WA it might take a day or so... & then some. I take the view I do what I can, more to the point what I want to: If I don't know I tend to leave it well alone !
With well over 20 million questions that have been asked, adding questions to categories is a way of attracting the correct person - or people - who will best be able to answer your specific question.
Not all of them are - most are quite sensible ! However - you have to remember there is no minimum age for asking questions on here, so some appear to have been written by a five-year-old (even...