Css
 

What are the use of CSS in web design?

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CSS provides rich functionality, including defining the appearance of HTML pages when they are printed. It is much easier to maintain the appearance of a Web site.

For the html stays with a better appearence!

in simple world css is structure design of your website.

Cascading Style Sheets (CSS) is a style sheet language used for describing the look and formatting of a document written in a markup language. While most often used to style web pages and interfaces written in HTML and XHTML, the language can be applied to any kind of XML document, including plain XML, SVG and XUL.

CSS is designed primarily to enable the separation of document content from document presentation, including elements such as the layout, colors, and fonts.

CSS { Cascading Style Sheet }
 

CSS is a language that describes the style of an HTML document. It helps in maintaining the appearance of website. It is related to presentation part.