What does CSS stand for, and what is its main use in web development?

Cascading Style Sheets (CSS) is a language used in web development to define the presentation layer of a web page. The primary purpose of CSS is to control the style and layout of web pages, allowing developers to separate content from design. This separation enables greater flexibility and efficiency, as styles can be applied across multiple pages using a single stylesheet.

With CSS, developers can manipulate various aspects of webpage elements, such as colors, fonts, layouts, and responsive design features. This capability enhances the user experience and allows for a more visually appealing and organized presentation of content on the web. Through CSS, different styles can be applied to different devices and screen sizes, making it a critical tool in modern web design. Thus, the core use of CSS is indeed to style and layout web pages, making it essential for creating attractive and functional websites.