One of the prominent features of Google+ is this concept of "Circles." Circles are Google’s way of managing online relationships based on how you know someone by placing that person in your relevant circle. By managing your circles effectively, you end up sharing the right content with the right people and also only see information that matters to you.
If you’re like most business owners, you probably spend a lot of time each day searching for valuable content that you’d want to share with your audience on your social networks. Even though you can copy and paste each link into the status update window, it’s a slow manual process.
Hashtags are much more than a collection of letters and symbols. They can be powerful tools to reach new audiences, bring together like-minded individuals and create trending streams of conversation. Look at what #briskpic has done. Or #INBOUND13. Or #HeadlineHelp.