What does CSS stand for?

CSS stands for Cascading Style Sheets. This terminology is pivotal in web development as CSS is a stylesheet language used to describe the presentation of a document written in HTML or XML. The term "cascading" emphasizes that styles can be applied in a hierarchy, where multiple style rules can affect the same element but cascade in a defined order based on specificity and importance. Understanding this concept is crucial for web developers as it allows for more organized, efficient, and maintainable code when styling web pages. It enables designers to separate content from layout, ensuring that changes to appearance can be made without altering the underlying HTML structure. This separation ultimately enhances the flexibility and adaptability of web applications.