The integral part of web development is cascading style sheets, which are popularly called CSS. The library contains a long list of functions and properties that help us develop functionalities in a couple of lines rather than writing messy JS code. This may include position sticky, media queries, or setting up the aspect ratio for the web page.
In my web dev experience, I always divided the functions and properties available in CSS into two partitions. One section contains easy out specific design-related items in web development, such as sticking an element to the top while the user scrolls. The other section contains better efficiency, optimization, and improvement of the development strategies according to the latest web development trends.