A retail business is launching a new shoe line with multiple style and color combinations. Which ad format should the retailer use to show all styles and link directly to each product?

Using a carousel ad format is ideal for showcasing a new shoe line with multiple style and color combinations. This format allows the retailer to display several images or videos in a single ad unit, where users can swipe through different options. Each image can feature a unique style or color of the shoes, providing a comprehensive view of the product range.

Moreover, carousel ads enable the retailer to link each individual image directly to its associated product page. This direct linking capability is crucial, as it streamlines the shopping experience by allowing potential customers to easily explore and purchase the specific style they are interested in, without having to navigate through the website to find it.

In contrast, other formats like video, single image, or slideshow would limit the retailer's ability to showcase multiple products in the same impactful manner. A video might provide a creative representation but would not allow for direct linking to specific styles. A single image could focus on one shoe, thereby missing the opportunity to present the entire line. A slideshow, while it can display multiple images, doesn't offer the same interactive experience as a carousel, which encourages engagement through swiping. Thus, the carousel format excels in this scenario, making it the most effective choice for promoting the new shoe line.