Skippable in-stream ads and in-feed video ads are optimized to drive action among potential customers in decision-making moments.

• Skippable in-stream ads and bumper ads
• Non-skippable in-stream ads and in-feed video ads
• Skippable in-stream ads and in-feed video ads 
• Non-skippable in-stream ads and skippable in-stream ads

The correct answer is: Skippable in-stream ads and in-feed video ads 

Explanation: Skippable in-stream ads and in-feed video ads are optimized to drive action among potential customers. They play before, during, or after other videos on YouTube, and appear in YouTube search results, YouTube watch next, and the YouTube app Home feed. These ad formats help drive conversions, reach new users across multiple devices, and encourage interaction with the brand by including interactive features like call-to-action buttons, product feeds, and more. These ad formats can be bid on based on overall impressions, complete video views, or video interactions.