An advertiser is setting up a Catalog sales campaign that will include prospecting and retargeting audiences. What is the best way to set up the retargeting audience?

Dynamic retargeting is the best option for a Catalog sales campaign because it automatically shows users ads for products they previously viewed or interacted with on the advertiser's website or app. This personalization is highly effective for driving conversions. Search feed retargeting and home feed retargeting are not standard Pinterest ad features for this purpose. A Lookalike audience is used for prospecting (finding new customers similar to existing ones), not for retargeting users who have already shown interest.