Google+ is central to Google apps and services, and not just social networking and authoring since many Google features use your Google+ profile as your primary ID. It's one of the largest social networks, but it also links easily to your other social networks, blogs, and webpages. Google+ is standard in many Android installations, but you can download and install the latest version independently, too.
Updated interface: An updated top menu and toolbar clean up Google+'s looks and enable quicker access to Circles and Communities, Explore topics, What's Hot, and Nearby features.
SMS PIN: Keep SMS secure by creating a custom PIN on the Google+ Settings page.
Sharing options: You can enhance your privacy by customizing your Sharing, Location Sharing, Notifications, Contacts, and more from the app's Settings menu.
Too much sharing: By default, Google+ shares SMS posts with your entire circle, and your Google+ profile exposes your interests and activities to other users. Be careful what you share, and take time to configure your sharing and privacy options.
Future uncertain: With hundreds of millions of users and considerable development effort, Google+ isn't going away, but some industry watchers suggest that Google's social media ardor has cooled, which may push Google+ into the background.
Google's social media strategy will undoubtedly continue to evolve, yet Google+ will remain more or less central to the tech giant's Android presence. This most recent update is the best iteration of Google+ yet.