Has an absolute ton of features including :

OpenGraph Article - These tags will tell Facebook and search engines what your page is about. It also makes links shared on Facebook alot nicer. This all generates from content set within articles.

OpenGraph Other - Allows you to set information on your company and where it is based. Takes full advantage of the OpenGraph platform easily.
Twitter Cards - Add Twitter Card Meta Data on the fly with this section that allows your articles, when shared to display your Twitter username.
Google+ Publishing - Displays the code that's compatible with the Google+ platform including the publisher code to link your website to Google+

Google Anayltics and Webmaster - To allow tracking this plugin will also publish your Google Analytics code plus webmaster tools publishing information for Google, Bing and Yandex.

Plus : Alexa Verification | Skype Click to Call | Robots | Google+ Recommendations | Google+ Verfication | Last Modified Schema | Published Schema