When someone asks a particularly popular question it can get their name and photograph in front of an active and interested audience; this is the LinkedIn equivalent of presenting from a stage and is one of the reasons groups can be such a useful tool in growing a network of helpful individuals.

The more you participate; the more you ask interesting and helpful questions; the more you flag discussions you like and help people out, the faster your star will rise. More people will ask to connect with you, more people will follow your company and more people will get in touch with you.