"We’ve spent a lot of time listening to what people using Google+ had to say. There were two features they kept coming back to: Communities, which now average 1.2 million new joins per day, and Collections, which launched just five months ago and is growing even faster."
The new Google+ is based on interests and is mobile friendly.
Today, we’re starting to introduce a fully redesigned Google+ that puts Communities and Collections front and center. Now focused around interests, the new Google+ is much simpler. And it’s more mobile-friendly—we’ve rebuilt it across web, Android and iOS so that you’ll have a fast and consistent experience whether you are on a big screen or small one.
You can preview the new Google+ on the web today by signing in and clicking “Let’s go” when you see the prompt. For now, you can toggle back to the classic Google+ with one click in the bottom left-hand corner.
Google plans to roll out updated apps with the new design for Android and iOS shortly.