Two types of S-Commerce and third generation.

Indirect S-Commerce: (example) You visit a place to diving, you like it, share it on social networks, then your friends ask you "Where did you go?", then they will go to the same place and buy same services.

Direct S-Commerce: (example) You sell products or services, you upload on your website, then you share it on social networks, your friends buy and share it.

Perhaps a third generation of S-Commerce is coming or maybe a s-commerce 3.0, we should be prepared because if so, this would be a explosion for all StartUp and companies.