Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Naver Analytics is a Korean based analytics service.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.