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Site is a dimension used to aggregate metrics by websites, which is especially useful if a publisher operates multiple websites.
Ad Space
A unique placeholder or space or area within a webpage or app that is reserved for displaying advertisements. It is a location where ads can be inserted or loaded dynamically. Ad Spaces are typically pre-defined and can be positioned strategically within the content layout to optimize visibility and engagement. Each page can have multiple Ad Spaces, serving different sets of ad formats and sizes.
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