Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in HTML or XML. CSS enables web developers and designers to separate content from design, allowing for greater flexibility and control over the layout, colours, fonts, and overall visual aesthetics of web pages.
Effective use of CSS can enhance accessibility by ensuring that websites are visually appealing across various devices and screen sizes, which is an essential aspect given the increasing importance of mobile browsing. Responsive design techniques facilitated by CSS help ensure that content is easily readable on all platforms, which helps to retain visitors longer and decreasing bounce rates. A good organisation of stylesheets contributes to cleaner code which makes it easier to mainten and update. Search engines favour sites with clean code structures as allows for better crawling and indexing.
