Google launches Google+ Sign in feature that allows users to sign in third party websites and apps by using Google+ account. It’s easier for users to sign in with their existing Google account than to create and remember details of a new account.
If you click on the Google+ Sign in button it asks permission to access your Google+ account basic information. After click on the Allow button you can sign in a specific website and apps with your Google+ account.
Google+ Sign-In also comes with the protections and safeguards like 2-step verification, so you can always sign in with secure. And also its allowing users to sign in with Google lets them select which identity they want to use in your app. By offering this choice, users are more likely to feel at ease with the decision to sign up for your service, improving conversions.