| 摘要 |
An ad server and syndication system provides a browsable hierarchy of categories, such as topical ad categories and/or product categories, with which specific ads may be explicitly associated. A first user interface provides functionality for advertisers to browse the hierarchy, and to post ads in association with specific ad categories. A second user interface provides functionality for web site operators wishing to host ads on their web sites to select or exclude specific categories of ads to host. In one embodiment, a web site operator that sells a particular category of products can locate that product category within the hierarchy, and then select from a corresponding list of product-related-services that may be advertised on web pages associated with such products.
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