CloudFlare is a global CDN and DNS provider that can speed up and protect any site online.
The DOCTYPE is a required preamble for HTML5 websites.
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.
Sites who has this tag are verfied by google to use WebMaster tools
The http-equiv attribute provides an HTTP header for the information/value of the content attribute.
The http-equiv attribute can be used to simulate an HTTP response header.