Web sites can contain hundreds of pages, even thousands. You have spent your time making a look and brand for your web site, using different font sizes, colors, margins etc all within each web page.
Later on you decide that you want to change the background color of the website, and then realize that you will have to edit every single web page and change the background color in the body tag.......
<link rel="stylesheet" href="http://www.yoursite.com/style.css" type="text/css">
Some typical content within a style sheet might look like this :
Then within your web page if you wanted to make a piece of text using the heading formatting then simply do something like :
That’s the down and dirty basics of using stylesheets!