One of the services that can be expected at the highest level of search engine optimization is code optimization.  This involves completely overhauling the HTML code on your website.

Optimizing your HTML will affect search engine rankings in two ways.  One major benefit is that your content can be presented in an easy-to-understand format.  The other significant advantage is that it can help reduce the time it takes for your website to load.  You don't want search engine spiders to have to wait until your page loads.

Improving the code quality and efficiency of your website is a critical component of the   search engine optimization process, since the end goal is to make sure that your code is search engine friendly.