Unverified50% confidenceFactExact time
Google Ads在2000年代初期通过AdWords平台普及了基于广义第二价格拍卖（GSP）机制的关键词竞价广告，出价最高者获得最佳位置但实际支付第二高出价加最小增量
1
Sources
50%
Confidence
Long-term
Relevance
8/29/2026
First Seen
Sources
OverMCP：透明竞价+真实点击，重新定义开发者产品曝光
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