An advertiser wants to expand their interest targeting. Which solution should be used?

The selected answer is correct because Audience Insights is the primary tool within the Pinterest Ads Manager designed to help advertisers discover new, high-affinity interest categories based on their existing audience's search and saving behavior. By analyzing the "Affinities" tab, an advertiser can see which specific topics their audience is most interested in compared to the general Pinterest population, providing a data-driven roadmap for expanding into new interest segments that are likely to resonate. While Pinterest Trends is useful for identifying seasonal shifts and rising keyword volume, only Audience Insights provides the cross-category behavioral data needed to systematically scale targeting based on the actual psychographics of a specific brand's followers or website visitors.