雅虎关键字广告 (前称『雅虎搜索行销』)，是雅虎推出的关键字广告服务，让广告主可以在搜索引擎在对网站搜索者提供搜索结果时显示广告。关键字广告的特色在于能够透过搜索者在搜索的时候所使用的关键字提供特定文本式广告，并且以点阅计费 (Pay-per-click)对广告主进行收费；个别关键字的广告刊登价格以自由竞标的方式决定。雅虎在收购 Overture Services, Inc. (前称 Goto.com) 后开始提供关键字广告服务。

Yahoo Search Marketing is a keyword-based "Pay per click" or "Sponsored search" Internet advertising service provided by Yahoo.

Yahoo began offering this service after acquiring Overture Services, Inc. (formerly GoTo.com). GoTo.com was an Idealab spin off and was the first company to successfully provide a pay-for-placement search service following previous attempts that were not well received.