1. A method for managing advertiser search listings in a pay for placement database search system, each search listing including at least one search term and a network location, the method comprising: storing a database of search listings, at least some of the search listings being associated with respective advertisers, the search listings being searchable in response to a query received from a searcher; and grouping advertiser search listings into advertiser defined categories, the advertiser defined categories being independent of search listing search terms.