This site uses the viewport meta tag which means the content may be optimized for mobile content.
Google+ Sign-In button allows users to authenticate on websites using their Google+ account.
Google+ platform websites integration using the Google+ platform tag.
Google APIs are application programming interfaces developed by Google which allow communication with Google Services and their integration to other services.
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.
Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.