| 摘要 |
Methods, systems, and apparatus, including computer program products, in which syndication spaces for a webpage are identified, each syndication space defining a location on the webpage in which one or more advertisements are displayed at a client device, and each syndication space associated with one or more attributes. Display data is generated that causes each syndication space to selectively display a visual indication of one or more of the attributes on the webpage at the client device.
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