You’ve probably heard of SEO, since it’s very hot right now. It stands for Search Engine Optimization. SEO is the process of increasing the amount of visitors to a site by designing the site content so that the site ranks high in the search results of a search engine.

The higher a website ranks in the results of a search, the greater the chance that a user will visit that site. Let’s face it, most people are lazy. They’re not going to spend time clicking and scanning tons of pages of search results. Therefore, where a site ranks in a web search is absolutely critical for directing more traffic toward the site. SEO helps to make sure that a site is accessible to a search engine and improves the chances that the site will be found by the search engine.

To understand how this works, you need to know a little bit about how search engines work. Typically, a search engine sends out a spider to fetch as many documents as it can. Then another program, called an indexer, reads these documents and makes an index based on the words each document contains. Each search engine uses a unique proprietary “algorithm” to create indexes so that hopefully only meaningful results are returned for each query. These indexers compute the keyword density.