Quora is the site where one can update them self, where one can gather good info about the subjects in which you are interested. You can write your opinion and the objections on the particular topics, you get more idea about the outside world. Once you download the app it becomes the habit to visit into it and study the intresting facts.
If I have any query I post into quora and I am sure I get an excellent reply and solve my doubt. The best I like is how iim students crack the interview, what type of questions are asked in the interview and how they face it.
Overall its a good app, which provide us with good general knowledge and update yourself.