You ran a successful awareness campaign with a video ad that's 30 seconds long, and you now see the value in re marketing to audiences who saw it with memorable, shorter video ads. What video ad format should you use to achieve that goal?

The selection is correct because bumper ads are the ideal format for reinforcing brand messaging through remarketing due to their concise, 6-second non-skippable nature, which maximizes frequency and memory encoding without causing viewer fatigue. In the context of a phased campaign, the initial 30-second video serves to establish the narrative and provide detailed information, while the subsequent bumper ads act as "echoes" that keep the brand top-of-mind at a lower cost-per-thousand (CPM). By targeting users who have already engaged with the longer creative, these short-form ads leverage existing familiarity to deliver a high-impact visual punch that is exceptionally effective on mobile devices, ensuring the core message remains salient throughout the consumer's journey without requiring the significant time commitment of a full-length in-stream ad.