An advertiser has a Catalog sales campaign that is optimizing towards the checkout event. The advertiser is having difficulty scaling this campaign to a wider audience and increasing overall awareness. What should the advertiser do to help scale the campaign?

The selected answer is correct because the Pinterest algorithm requires a sufficient volume of data signals to optimize delivery, and if a "checkout" event is too rare, the campaign will struggle to find a broad enough audience to scale. By optimizing toward a more upper-funnel conversion event—such as "Add to Cart" or "Page Visit"—the advertiser provides the system with a significantly larger pool of data points, allowing the algorithm to more efficiently identify and reach interested users who are likely to move through the purchase funnel.