From Google’s site:

A quick look at sharing on Google+

Google+ Pages help you build deeper relationships with customers by sharing your thoughts, links, photos and promotions with the right people at the right times. Want to offer a behind-the-scenes look at your product team in action? Highlight a unique sale? Get live, face-to-face feedback by holding multi-person video chats with customers all over the world? With Google+ Pages, you can share what matters in a way that matters most to your business.

Publish Posts

Once you have people on your page, how do you start talking to them? You can use your Stream to post relevant content, including photos and videos, and even engage your followers directly by asking questions that start discussions. You can make your posts public so people can find them using search, or use Circles to tailor specific messages to specific followers.

Launch Hangouts

Hangouts let you set up one-click video conversations with customers and colleagues alike. You can get face-to-face product feedback, help customers solve problems or simply get to know them better, and collaborate with remote colleagues on shared documents in real time — all over high-quality, easy-to-use video chat.

Manage Circles

Different people are interested in different parts of your business. Whether it’s breaking news, updates, promotions, links, photos – even talking face-to-face with groups via easy-to-use video chat – Google+ lets you easily share the right things with the right customers.