A normal search will return only the sites that match exactly your search terms entered. For most searches, this should work very well, but some times you might want to view sites that are conceptually related to a search term. The concept search will not only return the sites that match the query, but will also list sites that are highly related to what you are searching for. Zerx will add sites to the results that it thinks will be relevant based on the search terms, even though the site does not contain the search terms. Zerx is conceptually different from internet directories and traditional search engines.
Directories rely heavily on submissions for new site additions.
Traditional search engines spider the web to find out many of the URLs in the database, but they also rely on submissions in order to include sites that do not have links to them anywhere on the web. Zerx sits in a void, between search engines and directories. The sites included in our search are found by spidering the web. Sites included must meet certain criteria, which are determined by our spiders. These criteria include a minimal link popularity, certain spam filters, and a few other requirements.