that's not a logo. Those concentric rings are a depiction of network hops. It's a smaller version of a section of an infographic that I can't find at the momen

that's not a logo. Those concentric rings are a depiction of network hops. It's a smaller version of a section of an infographic that I can't find at the moment. I agree it's not obvious. In ssb, by default, you get content from friends, and friends of friends. You don't follow the tree of connections indefinitely.