If you ran a successful awareness campaign using a 30-second video ad and now see the value of remarketing to audiences who watched it with memorable, shorter video ads, you should use bumper ads to achieve that goal.

• You should use masthead ads.
• You should use in-feed video ads.
• You should use non-skippable in-stream ads.
• You should use bumper ads.

The correct answer is: You should use bumper ads.

Explanation: To achieve the goal of remarketing to audiences who watched a successful 30-second awareness campaign, a suitable video ad format would be a shorter ad that is memorable and engaging. A 6-second bumper ad could be an effective format as it’s short enough to avoid audience fatigue, and long enough to convey a message. These ads work well as reminders and reinforce the message delivered in the longer ad. Another format to consider is a series of shorter social media ads, each highlighting different aspects of the original ad’s message.