CSS Stands For Cascading Style Sheets
CSS is a simple design language intended to simplify the process of making web pages presentable.
CSS is easy to learn and understand but it provides powerful control over the presentation of an HTML document
CSS handles the look and feel part of a web page. Using CSS, you can control the color of the text, the style of fonts, the spacing between paragraphs, how columns are sized and laid out, what background images or colors are used, layout designs, variations in the display for different devices and screen sizes as well as a variety of other effects.
Most commonly, CSS is combined with the markup languages HTML or XHTML.