Cascading Style Sheets (CSS) are used with HTML. The HTML markup part of this combination sets things up so Google can understand your site and its various elements better. CSS dresses things up and makes what’s presented user-friendly and visually appealing in a way that’s not possible with HTML alone.
CSS’s SEO Impact
Ever since mobile friendliness became a thing for ranking purposes in 2015, Google has been paying more attention to CSS. To correctly lay out pages for smaller screens, CSS code needs to be done properly. CSS helps Google determine if pages are laid out correctly on desktop screens as well. This code also shows where each piece of content is placed.
JS’s SEO Impact