Google Analytics is a free web analytics service that tracks and reports website traffic.
Internet Information Services (IIS) is an extensible web server software created by Microsoft for use with the Windows NT family.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
W3 Total Cache (W3TC) improves the SEO and increases website performance and reducing load times by leveraging features like content delivery network (CDN) integration and the latest best practices.
WPML plugin makes it possible to build and run fully multilingual WordPress sites.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.