Link directories offer a way of collecting and categorizing links to other websites. The more directories your site is listed in, the better you will perform in search results. Most search engines crawl directories, and some even use directory listings to supplement their search results. How you submit your site to directories can mean the difference between your site been included in the directory or not. Before you create your listing, it is a good idea to navigate through the director and take note of the other listings in the various categories.