CSS or cascading style sheets is a relatively simple and powerful method to increase look and feel of a website or any web documents. The word style refers to the color, font , layout, spacing or in general anything that describes the presentation of the document. It is used to improve the visual of documents written in HTML or XML. But it can be used for any markup language as well.

CSS has a very simple syntax which makes use simple English words and most common symbols that anyone without much prior knowledge in programming or graphics designing can understand. Usually the web presentation is done in CSS and now the popularity of CSS is increasing over other methods like flash and image because it is said to be more search engine friendly.

There are two methods of attaching a CSS to a web template. One is to write it directly to the markup language. Alternatively, we can write the entire CSS as one file and can be attached to the template using specified tags.

• CSS is also a W3C standard.
• There are three generations of CS.CSS1 was the first to become a W3C standard.CSS2 the presently used version and CSS3 is currently under development.
• One of the major limitation of CSS was the dificulty in adoption of it as a web standard.
• Lack of browser support is another issue.