Final answer:
Paid search dimensions in Report Builder are best compatible with Paid Search Revenue and Cost Per Click (CPC), as both metrics pertinent to evaluating the performance and efficiency of search ad campaigns. Active View and Downloaded impressions are related more to display and video ad metrics.
Step-by-step explanation:
In the context of Report Builder for online advertising performance, paid search dimensions are compatible with several metrics that reflect the effectiveness and cost-efficiency of search advertising campaigns. When looking specifically at the options provided, the metric that aligns best with paid search dimensions is likely Paid Search Revenue. This metric represents the income generated from users who click on paid search ads and perform a transaction or conversion. It's a direct reflection of the advertising's success in driving profitable user action.
Cost Per Click (CPC) is another closely related metric. It measures the cost incurred for each click on a paid search ad. This metric is instrumental in understanding how much is being spent to attract potential customers and is a critical element of search campaign management when paired with conversion data to calculate return on investment (ROI).
Metrics like Active View and Downloaded impressions, although important in the broader landscape of digital advertising analytics, are more commonly associated with display advertising and video advertising metrics. Active View, for example, pertains to the measurements of viewable impressions within display or video advertising, and Downloaded impressions are typically connected to the count of ad impressions that have been downloaded and presumably seen by users, not necessarily in the search advertising context.