1. Related hashtags – this is likely the most important for content marketers. Hashtags are no longer just for Instagram and Twitter. The new, and optional, related hashtags feature lets Google+ analyse posts and in turn recommend hashtags. 2. Updated news stream – it’d be more accurate to say re-built, as this is a whole new experience. A new multi-column design allows users to scan multiple posts at once. Photos and videos can still span multiple columns, and new animations include a pop-out box when you want to share. 3. Hangouts App – a new standalone messaging app for iOS, Android and Google Chrome will encompass Google Talk, Google+ Messenger, and the original Google+ Hangout video chatting service. Designed to take on Apple’s FaceTime, maybe? The unveiling of Hangouts as a unified messenger service has been expected. Get the full story at Smart Insights and the official Google blog Read also "The changes to Google+ are great. But they don’t matter" at Mark Schaefer's Grow blog