Abstract: Advertising systems and methods are described that are configured to receive bid requests for ad placement. The bid requests include a bid amount and an ad type, category, and/or geographic area. The ad type includes click ads, call ads, and/or call and click ads. Ad pricing is determined for ad placement using the bid requests in a dynamic price auction. The ad pricing includes a floor price and/or another ad price. The advertising systems and methods are configured to periodically modify the ad pricing according to price correlation data among ads having different ad types. Ad pricing also includes optional fixed-price advertising for set time periods for a subset of advertisers based on auction bid prices. One or more ads are placed in electronic ad spots according to the ad pricing. Search results that include the placed ads are presented in response to a user search queries.

Abstract: Constructing a query in a natural-language format using a purpose-driven query template. A user is prompted to select one of a plurality of query purposes. User-input is received indicating a selected one of the plurality of query purposes. A first list of conditions is selected from a plurality of lists of conditions based on the selected one of the plurality of query purposes, then displayed in a format in which each of a plurality of conditions in the first list is grammatically joined to at least one other condition in the first list to form a query sentence, and wherein each of the plurality of conditions in the first list is associated with a respective set of user-selectable values.