Hostinger is an employee-owned Web hosting provider and internet domain registrar.
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.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
Yoast SEO is a search engine optimisation plugin for WordPress and other platforms.