Which is the best tip for optimizing a TrueView video for viewer engagement?

• Add exclusions to the campaign
• Look at engagement rate for targeting and focus on the methods with the highest view through rate
• Run both an in-stream and a video discovery version of the ad
• Increase each target group’s bid by 100%

Correct answer is:

• Look at engagement rate for targeting and focus on the methods with the highest view through rate

Explanation: Video ads provide a range of viewer actions that can be measured and tracked so you can better achieve your advertising goals. For example:

• If you find that your video ad’s view rate is lower than ads in your other campaigns, you can adjust your campaigns for a higher view rate.
• If your cost-per-view (CPV) is higher than your target CPV and you’re willing to reach a broader audience, try adjusting to a lower CPV.
• If you’re not achieving your clickthrough rate (CTR) or CPV goals (and are paying much less), you can consider increasing your CPV or CTR.

Read more here: https://support.google.com/adwords/answer/3013684