What ad format combines both a video and a product for an online sales business?

The choice of Collection as the correct answer is supported by its unique capability to enhance the shopping experience by merging video content with product listings. In a Collection ad format, a video can effectively showcase a product in action while simultaneously displaying related items for sale, allowing viewers to engage with the brand through both visual and interactive elements. This makes it a powerful tool for online sales businesses looking to drive conversions, as it leverages the appeal of video storytelling to highlight features and benefits, while also making it easy for viewers to explore and purchase products directly.

In contrast, Slideshow ads focus on creating a video-like experience using a sequence of images and are less interactive for product engagement. Stories, while visually engaging, are typically short-lived and emphasize ephemeral content rather than product promotion. Video ads by themselves can effectively tell a story but may not seamlessly incorporate direct product interaction, limiting their effectiveness for online sales compared to the Collection format.