AMP for WordPress automatically adds Accelerated Mobile Pages (Google AMP Project) functionality to your WordPress site.
AMP, originally created by Google, is an open-source HTML framework developed by the AMP open-source Project. AMP is designed to help webpages load faster.
Gravatar is a service for providing globally unique avatars.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Site Kit is a one-stop solution for WordPress users to use everything Google has to offer to make them successful on the web.