Linkedin is one of the biggest social media networks and as well one of the oldest one on the market.
Detlev on Linkedin
I’m on that network quite a while and if you like just have a look at my profile at Linkedin. Below there are a few screenshots which form the main section of a Linkedin profile and as well from my personal Skills and Expertise section. The second section, in which you can get endorsed by your network connections for your skills just started a few months ago.