Your blogger here is at a new high. According to the people at Klout,

Klout measures your influence online. We measure influence primarily as the ability to drive others to action. When you produce content online, we look at how your network responds to that content.

Klout takes in data from social networks and gives you an overall Score based on your online influence. We get this data from public networks (such as your Twitter profile) and any other networks you’ve connected to Klout (such as Facebook and Google+). We process about 3 billion pieces of content and connections daily to give you a new, accurate Score each morning.

The exact algorithm Klout uses to calculate scores has changed from time to time, and has never been made public.