Does anyone know what matters the most in google plus.

Who follows you ? If so do they have to be in the same field or industry ?

The number of + 1 and share you have for a post ?

Is it ok to share a post from the New York Times to get some popularity or am I just going to give the NYT popularity instead of me by doing that ?

Finally do I give PR to a person when I follow them ?

Thank you,