Google +

Google + is Google’s time to get Social and do it better than everyone else.

“Circles" groups your friends together makes sharing easier.

"Sparks" helps you find interesting content based on interest – like Google reader

Hangouts lets you video chat with all your buddies.

"Huddles" is a new group messaging app.

"Instant Upload" shares your mobile photos.

As far as your business goes, Google+ business pages combines what works best for business on Facebook and Twitter. Google+ business pages  allow users to choose to follow your business and / or through “circles”.

My advice:

A Facebook business page and a Twitter business page are essential to your business has Facebook already has over 800 million users, whereas Google+ has 40 million, but in the future Google+ will gain momentum through its wide variety of services (Youtube, Android, Chrome, Gmail). I also think that creating a Google+ business page will help with your businesses Google ranking. So be an early adapter and get on Google+!