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.
Speedtest Custom is a robust and accurate testing solution that is HTML5-based, Flash-free and supports both mobile and desktop browsers built by Ookla.
Open Graph is a protocol that is used to integrate any web page into the social graph.
PHP is a general-purpose scripting language used for web development.
Swiper is a JavaScript library that creates modern touch sliders with hardware-accelerated transitions.
VK is a Russian online social media and social networking service.
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.
WPMU DEV Smush is a WordPress plugin that allows you to optimise images without losing quality.
Yoast SEO is a search engine optimisation plugin for WordPress and other platforms.