Currently Twitter and Facebook seem to be our best bet. Both FB and Twitter have the highest user base, FB has wide variety of groups, communities, and it also provides business tools. I haven't use Twitter so I can't really have any worthy opinion about it.
Other viable sites can be Pinterest, GG+ (they also have huge user base but somehow it seems not really effective to me), Linkedin, Quora...
Other viable sites can be Pinterest, GG+ (they also have huge user base but somehow it seems not really effective to me), Linkedin, Quora...
. I've worked and currently I'm still working in blog management and SEO business for 1 year. I'm still noob in this SEO business though so I hope to learn more from you guys.