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.
ThemeIsle Menu Icons plugin gives you the ability to add icons to your menu items, similar to the look of the latest dashboard menu.
Twenty Twenty-One is the default WordPress theme for 2021.
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.
Yoast SEO is a search engine optimisation plugin for WordPress and other platforms.