Quora is a question-and-answers platform that is in business since 2009 and hosts a ton of questions sporting over 400,000 different topics, which is what makes it very interesting to join or follow.

It might not be perfect as every question or answer is as good as the person asking or responding to it.

That said, because of the Q&A core in Quora it ranks high in every question asked via google. So why should you use Quora? 

Quora's founding team came from Facebook and understands social networking exceptionally well. Following individual writers, topics, questions, and answers is easy. They still make mistakes in user experience but, for now, it's still the best solution that exists today. Comments are a key feature of Quora.