We are all familiar with social networks: MySpace, tweeter, Facebook. DA itself is a type of social network. We use SN to get in touch with photographers we know, we are interested of and helps us spread our ideas.
But Google+ takes everything we know and puts it on another level. The message it sends is "Photographers all around the world - Unite!" No matter who you are, how good your skills are, what type of photography you like, are professional or not. Just find people and their art, appreciate it, communicate, learn.
So, if you want me to "unite" with me :-) -> Me on Google+