Clean HTML code provides the following four benefits: 

• 1. Website Accessibility - Validating your HTML code helps pinpoint potential roadblocks that could prevent search engine spiders or visitors from accessing your entire site.
• 2. Faster Loading - Removing unneeded code can help create smaller pages which intern helps your website load faster. Faster loading provides a better customer experience and can help with search engine rankings.
• 3. Less load on servers - Clean code will not tax your server as much. This cuts down on the amount of Web space and bandwidth used and can reduce the cost of hosting your site.
• 4. Browser Compatibility - Validated code ensures your site is compatible with current Web browsers, such as Internet Explorer(R) and Fire Fox(R).