Your client is interested in comparing the performance of YouTube campaigns against that of video campaigns across other publishers and media channels. Which two metrics should your client use to get a comparable view of their performance? Select two.

The correct selections are Reach and Frequency because they serve as the universal "common currency" for measuring media performance across disparate channels, including YouTube, television, and other digital video publishers. While metrics like "Engaged-view conversions" or "Brand Lift" provide valuable platform-specific insights for YouTube, they cannot be directly compared to traditional or third-party media buys that may lack the same tracking capabilities. By focusing on Reach (the number of unique individuals exposed to an ad) and Frequency (the number of times those individuals saw it), a client can create a standardized, holistic view of their media plan's "gross rating points" and overall market penetration regardless of the underlying technology or publisher.