CSS is a technology that provides efficiency in design and updates, is relatively easy to use, gives more flexibility and control, leads to faster loading pages, increased consistency, and brings more sophistication to web design. It is designed primarily to enable the separation of document content from document presentation. CSS reduces the complexity of pages and has led to the development of more sophisticated websites. It also improves accessibility and eliminates the need for tables for elegance. CSS has opened up the way for other technologies to be built on and be supported by it.