Google continues to add new features to their Plus platform to close down feature parity with rival services.
The latest one is Trends.
Trends is hugely popular on Twitter and helps in finding out what is popular on the network at any given moment.
Google is not promoting trends heavily right now as it appears only when you search for something.
And there are no separate trends based on where you are. It only shows the global trends which for now are largely focused on the US market.
It is a good start though Google would do good highlighting it in the side column of the user stream pages.