Search engine optimization does not just include the on-site and off-site optimization strategies that may be implemented on a given web site. The structure of the code and how it is organized is also a very important piece of the SEO puzzle. Jonathon Hochman, of SearchEngineWatch, recently spoke with Dan Crow, the product manager for Google’s Crawl Infrastucture group about clean code and how it affects the indexing of web pages. There are only so many pages that Google can index because of bandwidth and electrical constraints, and they attempt to spread the indexing love evenly. For example, Google isn't going to index Web sites A-G and then ignore H-Z. They must allocate their resources so that they are dispersed evenly and reasonably. It takes more time for a search engine spider to crawl a page with excess code. If every site had very clean, concise code, the spiders could index pages faster. This clean code structure would include the externalization of JavaScript and CSS. If all sites had succinct code, the search engines would be able to index more pages. So what exactly does this mean for us? This proves that every piece of the web site is important for SEO and should be addressed in the strategy that is implemented accordingly. This also shows that it is easier for the search engine spiders to index pages that have clean code.