To compare the relative efficiency of two media options within the same media class, or between two media classes, CPM is often used.

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CPM (Cost Per Thousand Impressions) is a common metric used to compare the efficiency of two media options within the same media class or between two media classes. It helps in calculating the cost of reaching a potential customer, which allows marketers to compare the effectiveness of different advertising channels.

To Compare the Relative Efficiency of Two Media Options Within