| 摘要 |
Described herein are methods and systems for choosing digital advertisements to send to a user's computer while protecting private information. When a user performs a search using a public site, the user's search information is stored in a database. The system builds a profile for the user based on the public search information, which can be used to select advertisements for delivery to a Web site accessed by the user. The system can also select advertisements based on information gleamed from a user's private (desktop) searches. For example, the system can use the content or category in which a user is searching to choose advertisements.
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