Application Request Routing (ARR) is an extension to Internet Information Server (IIS), which enables an IIS server to function as a load balancer.
Azure Front Door is a scalable and secure entry point for fast delivery of your global web applications.
Azure is a cloud computing service for building, testing, deploying, and managing applications and services through Microsoft-managed data centers.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Open Graph is a protocol that is used to integrate any web page into the social graph.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.