CSS stands for Cascading Style Sheets.
Css is one of the important factor in designing website page. Now all web developer give importance to this css property while designing website. Css plays a role about how web site page will display. CSS includes many of property which can effect to website page.
The page extention of css page where css styleet sheet are stored is .css. It becomes very easy to change layout of website if web developer use this style sheet. CSS includes propery which effect differently to browser to browser. That means all property may not work in all browser.