Social media aggregators are web sites which amass what you do on social networks or websites and centralize it all in one location.

These aggregators enable lifestreaming, which is a simply the publication and sharing of your daily activities in continuous sessions. These social lifestreams allow you to keep track of what your friends or other people are doing online.

In other words, they are tools you can use to observe the activity of others on various social sites or allow others to follow what you’re doing all around the web.

One of the most popular social aggregators is called Friendfeed and it appears to be the most widely used service amongst many other lifestreaming services.