Google+ brings the following core features to it’s Social Network:
Circles – Your Networks of friends that making posting, sharing and organizing very easy and intuitive.
Sparks – Top stories around your network
Hangouts – A dynamic web chat virtual room for your friends where you can watch YouTube Videos together, participate in trainings, meetings and even performances.
Huddle – Real-time Mobile collaboration tool
In addition to opening up it’s doors, Google+ has introduced over 99 improvements since it’s initial invite-only release in June. The two most recent announcements are that Google+ Hangouts now work with Android devices and with iOS (iPhone, iPad, iPod) coming soon. The other feature they’re introducing is the ability to search for people and topics on Google+.