| 摘要 |
Advertisements are provided to a user. An initial advertisement is provided to a user, where the initial advertisement is a first advertisement of a series of related advertisements from a same advertiser. Subsequent advertisements of the series are provided to the user based on a demonstrated intent from the user to view the subsequent advertisements while the user is viewing advertisements of the series. A cost per completion amount is determined based on the progression of the user within the series of advertisements.
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