I think what Anderson is refering to are search engines. Many people submit their personal websites to the popular searh engines so that they can start directing traffic when queries are made.
Many websites include META keywords so that search engines can easily locate sites. For example the HTML:
<meta name="keywords" content="aikido, riggs, midland, AAA">
By adding this source to your HTML any query made with those keywords would display your site. However, I do believe keywords are case sensitive so adding different forms of capitilazation of your keywords is a smart thing.