Why might you want to review the ratio of views to ads shown on a video in two time periods?

Reviewing the ratio of views to ads shown across two time periods helps you understand the trend of ad delivery relative to viewership. This trend can indicate if ad frequency is increasing or decreasing, and how that might impact viewer experience or monetization potential. For example, a declining ratio might suggest fewer ads are being shown per view, while an increasing ratio could mean more ads are being delivered. The other options are incorrect because: "To see which type of ad brought in the most revenue" requires revenue data per ad type, not just views to ads shown. "To see the effect of viewer engagement on ad rates" involves analyzing engagement metrics (likes, comments, watch time) and ad rates, which isn't directly addressed by this ratio alone. "To see how many subscribers watched the ad and commented on the video" involves specific subscriber and comment data, which is not reflected in a simple views-to-ads ratio.