Emotion is a library designed for writing CSS styles with JavaScript.
Next.js is a React framework for developing single page Javascript applications.
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.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.