Abstract: A charging method and system for determining an advertising cost according to a unit time are provided. The charging method includes checking a performance index numerically indicating performance of an advertisement; checking a priority index of a next-priority advertisement to the advertisement; and determining an actual charge per unit time of the advertisement based on the performance index, the priority index, and a predetermined weight.

Abstract: A method, system, and computer-readable recording medium for holding an auction and imposing a charge in relation to a search advertisement are provided. The method includes receiving bid information related to the search advertisement from an advertiser calculating device, the bid information including a search keyword, a posted time of the search advertisement, and a bid price for the search advertisement, determining a posting position and/or a posting order of the search advertisement with respect to a predetermined time slot of the posted time of the search advertisement, based on the bid price corresponding to the time slot, and posting the search advertisement according to the determined posting position and/or the posting order for the predetermined time slot.

Abstract: Disclosed is a method and system for managing quality of an advertising document. The method of managing document quality may include verifying a number of actual clicks corresponding to a number of clicks that may occur during a predetermined period with respect to at least one document that may exist on the Web, verifying a number of expected clicks corresponding to a number of clicks that may be expected to occur during the predetermined period with respect to the at least one document, and determining a quality management index by which quality of the at least one document may be numerically expressed based on the number of the expected clicks and the number of the actual clicks.

Abstract: Disclosed herein are a method and a system for providing an advertisement using a bidding starting price. The method for providing an advertisement includes: determining a bidding starting price for each keyword based on a minimum cost per click for a keyword and the number of expected clicks for the keyword; determining an area in which an advertisement of an advertiser is to be exposed based on a bidding price per unit time input from the advertiser; and providing the advertisement of the advertiser through the area, wherein the bidding price per unit time has a value of the bidding starting price for each keyword or more.