You say Circles works best in communities, in hubs. What does that mean? Can it spread around the globe just like my real trust connections?

Circles works best where there are local communities with economic connections.

 

In this sense, Circles networks are a reflection of “real life” networks. And they can be global if you have connections with people in different countries. But for a Circles hub to grow, a local network of suppliers and users/consumers is essential.