The site is an question/answer site lets you edit questions for grammar and spelling. Only thing is if it is determined that you're editing of questions changes the meaning of the question you will be "temporarily blocked from editing". Who makes this determination? A person or a robot? Who knows? Sometimes Quora will mark a question for grammar, spelling and/or other mistakes, yet such questions don't always have any apparent errors.
Anyway, I tried to delete my account but it turns I can't even do that, since I signed in through Facebook. I would recommend Stack Exchange instead of this place.