| 摘要 |
Disclosed is a method of running a keyword advertisement service. The method comprises receiving, from a potential advertiser, a proposed cost-per-click (proposed CPC) for a first keyword advertisement using a first keyword, providing historical data of a count of search queries submitted to the search engine and comprising the first keyword, and providing historical data of click-through-rates (CTRs) of keyword advertisement contents arranged in a first one of the plurality of groups of keyword advertisements. The method further comprises computing a first estimated cost for using the keyword advertisement service with regard to the first keyword advertisement for a future period of time, wherein computing uses the proposed CPC, historical data of a count of search queries and historical data of CTRs.
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