The advantages for a business to use web standards are pretty obvious when you think about them, but they will probably not show you an instant change in the number of visits you get or what your customers do when they are on your site. Web standards now days are to use XHTML and CSS to make sites that look very good while they can still load super fast. The article by Jeffrey Veen explains everything in great detail.
When you simplify and use web standards you only need to create one set of sites because that site will work the best in all browsers with the smallest amount of glitches. This in the end means customers are going to see the site the way you wanted it more often than not. With the seperation between HTML and CSS you cut development time in half. This allows for changes to occuring at the same time to two different aspects of the sight. It also allows for easy maintanence. All you have to do is chandge either the CSS or HTML. You do not have to go back and try to replicate a feel you made previously and forgot it. Its still in your CSS. These are just a few reasons to stick to the standards of XHTML and CSS for all sites.
