Google+ Sign-In button allows users to authenticate on websites using their Google+ account.
Use your Facebook account to sign into other sites and see what your friends are doing across the web.
Place a button on your site or application which allows Twitter users to enjoy the benefits of a registered user account in as little as one click. Works on websites, iOS, mobile and desktop applications.
Google+ platform websites integration using the Google+ platform tag.
A family of standard web feed formats used to publish frequently updated information like blog entries, news headlines, audio and video.
The average rating based on multiple ratings or reviews.
A review of an item - for example, of a restaurant, movie, or store.
A scheme.org entity that represents a person (alive, dead, undead, or fictional).
A scheme.org entity that represents a blog post.
Sites who has this tag are verfied by google to use WebMaster tools