Introduction: Why does HTML need CSS?

HTML uses “tags” that have some form of meaning. A headline tag says that this is a headline for what follows. A paragraph tag says that this text forms a unified thought. A table header tag says that this cell is a header for a row or column.

Cascading style sheets provide no meaning. They allow you to change how an HTML tag displays, but not what an HTML tag means. In general, when you create web pages using HTML and CSS, the HTML should describe your web page, and your CSS should describe its presentation. The page should remain readable in a wide variety of browsers and browser types without any of the CSS.