It is reported the teenagers are ditching Facebook. Teens are more frequently using Instagram, Twitter and Snapchat. My reference reports enjoying Pinterest that most and viewing Instagram through Pinterest.
Linkedin is used increasingly effective for business-to-business sharing of information and recruiting.
Social sites are using their own search engines to keep users on their site.
Advertising on social sites has increased dramatically.
Organizations utilize their own internal social media platforms.
Videos are increasingly used in creative advertising.
See more in this trends article.