A client brief states: A luxury home furnishing brand wants to boost holiday sales on Pinterest. With a product feed of 500+ SKUs, the goal is to advertise the full collection and track direct revenue impact. Customers tend to visit the site multiple times before making a $1,000+ purchase. Which ad format and KPI framework should the media planner recommend?

Shopping ads are ideal for showcasing a large product catalog (500+ SKUs) and driving direct sales, aligning with the client's goal to advertise the full collection and track revenue. Measuring by Cost per Action (CPA) directly tracks the cost efficiency of conversions (purchases), which is crucial for understanding direct revenue impact, especially given the high-value purchases. Carousel ads are good for showcasing multiple products but less efficient for a very large catalog and CTR doesn't directly measure revenue. Video ads are for brand awareness or engagement, not direct sales. Standard ads with CPM focus on impressions, not direct revenue impact or sales.