Google APIs are application programming interfaces developed by Google which allow communication with Google Services and their integration to other services.
When running in a browser on a mobile phone, "format-detection" meta tag determines whether or not telephone numbers in the HTML content will appear as hypertext links. The user can click a link with a telephone number to initiate a phone call to that phone number.
Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.