In web development, what does CSS stand for?

CSS stands for Cascading Style Sheets, which is a fundamental technology used in web development to control the presentation and layout of web pages. It enables developers to separate content from design, allowing for more flexibility and efficiency in styling HTML elements. The "cascading" aspect refers to the way styles can be applied in a hierarchy, with rules that can overwrite one another based on specificity and the order in which they are declared.

Understanding CSS is crucial because it allows for the creation of visually engaging websites. It provides the ability to define styles for various HTML elements, manage spacing, colors, fonts, and responsiveness to different devices. This separation of style from content not only improves the maintainability of code but also enhances the accessibility of web pages.