Google announced some new changes to Google+ based on user input.
The changes put an emphasis on Google+ Communities, which was THE element that they added which drew interest and users to Google+.
The other emphasis is on Collections. A tool that allows users to curate posts around specific content in personal and shareable collections.
Check out the full article on the Official Google Blog: https://googleblog.blogspot.com/2015/11/introducing-new-google.html?m=1
The updates should be rolling out to all platforms soon(an opt in option will be available on the web version). Whether you are a veteran of Google+ or brand new to it, get ready to navigate and explore the newly redesigned Google+.