| 摘要 |
<p>An online system selects advertisements for presentation in various advertisement slots to maximize the total value to the online system for advertisement presentation. Candidate advertisements for presentation to a user are identified and types of advertisements are associated with various advertisement slots. For example, types of advertisements are associated with advertisement slots based on values for presenting various types of advertisements in different advertisement slots and one or more ad placement rules. Candidate advertisements having an advertisement type associated with each advertisement slot are identified, and an expected value of various placements of the candidate advertisements having a type corresponding to advertisement slots is determined. Based on the expected values, a placement of candidate advertisements in advertisement slots is selected and presented to a user.</p> |
