The Css programming language was developed byWorld Wide Web Consortium (W3C)in the December 17, 1996.
Similarly with HTML, you can write comments in CSS. Comments are ignored by the browser and are useful in providing context and meaning and functionality notes for your code.To comment in CSS, write /*, then your comment text, then end with */.
The CSS is provide design , animation and position to web application as we know CSS would look as graphic property as well. To illustrate, our HTML Element on website.
Here i describe full explaination of CSS Selector.i.e  CSS Selector
This means that still we have to use HTML to process element but there presentation manage by CSS
A CSS property is a characteristic (like color, animation , position) whose connect value defines one aspect of how the browser compile and display the element after changes.There are CSS properties are follow that you can use to style a html element :
Below is an example of a basic  CSS  that would print the words Hello World..
<html>
<head>
<meta charset="utf-8">
<title>My CSS experiment</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1>Hello World!</h1>
<p>This is my first CSS example</p>
</body>
</html>