An advertiser is setting up a catalog sales campaign that will include prospecting and retargeting audiences. How should the retargeting audience be set up in order to gain the highest ROI?

Enabling dynamic retargeting is crucial for maximizing ROI in a catalog sales campaign because it automatically shows users ads for products they've previously viewed or added to their cart on your website. This personalized approach significantly increases the likelihood of conversion compared to generic ads. Lookalike audiences are for prospecting, finding new users similar to existing customers, not for retargeting past visitors. Search feed retargeting and home feed retargeting are general ad placements within Pinterest, but they don't inherently provide the product-specific personalization that dynamic retargeting offers, which is key for high ROI in catalog sales.