To now means that? Also, how do I activate notifications for the answers?
Your profile -> Settings -> Notifications -> Somebody responds to a discussion I'm following
About Klara's comment, at the moment I don't see a situation when "to" could be translated to "what", although maybe I'm not thinking of something obvious.
Odpowiadać + dative means to respond, to answer (a question)
Odpowiadać za + accusative indicates that it's about responsibility. In English you can also say "answer for" which means to bear responsibility.
Odpowiadać + dative has one more meaning, which is to suit someone. In this case, only context decides what it refers to.