Google Plus is a social network launched in 2011 that allows users to connect with others and organize contacts into circles like family and friends. It introduced features like video chat, profiles, and a "+1" button to indicate likes. While it had 250 million registered users by 2015, only 150 million were active. The document discusses how Google Plus differs from Facebook and how its features like circles and "+1" could benefit businesses for networking, advertising, and search engine optimization once the platform grows in popularity.