Which audience solution helps you build custom audiences based on aggregated signals across an advertiser's website?

The correct answer is Amazon Ad tag audience builder. The Amazon Ad tag audience builder helps advertisers create custom audiences by aggregating signals from their own website. By integrating Amazon’s ad tags with their website, advertisers can collect data on customer behaviors, such as pages viewed, products interacted with, or specific actions taken. This aggregated data is then used to build custom audience segments, allowing advertisers to target individuals who have shown interest in specific products or categories. This audience-building solution enables more precise targeting and helps optimize campaigns by ensuring they are reaching the most relevant potential customers based on their interactions with the advertiser's website.