| 摘要 |
When rendering a page for display, objects in the page are marked as visible, partially visible, or visible, based on the size and position of each object and the position and size of the page in the display area. This information is tracked as the impression data and can be used to provide better recommendations, advertising revenue and pricing information, and other business uses. In the end, business intelligence based on impressions and click-throughs can be based on what a user actually saw, not just what was rendered.
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