And I think that’s a lot of the reason why when you start to fragment your audience, you start to think about what you’re looking for, you’ll go to different spaces, and it parallels what we do as adults. You go to different bars when you’re in the mood for different things. You see different people when you want to go listen to music or when you just want to have a quiet drink with a couple of friends.

For higher-level execs with greater public visibility, social networks need to become as good at filtering as they are at connecting.

The way you can understand all of the Social Media is as the creation of a new kind of public space.

Social networks are like grease - in some cases, gasoline - for our personal business networking machines. If you aren't plugged in, you will be out-done by better-connected, hyper-networked colleagues and competitors.

LinkedIn is very good for browsing relationships and hooking into your contacts' networks. It re-connected me with high-level execs I hadn't talked to for some time, who then helped me close various deals.

And I think that’s a lot of the reason why when you start to fragment your audience, you start to think about what you’re looking for, you’ll go to different spaces, and it parallels what we do as adults. You go to different bars when you’re in the mood for different things. You see different people when you want to go listen to music or when you just want to have a quiet drink with a couple of friends.

Give me one other part of history where everybody shows up to the same social space. Fragmentation is a more natural state of being.