A toy retailer wants to increase sales for a promotion during a busy shopping holiday. It wants to build an audience based on site visitor behavior for better targeting. Which tools are necessary to achieve this?

To build an audience based on site visitor behavior, the toy retailer needs to implement the Pinterest tag and then use Pinterest Audience Manager. The Pinterest tag collects data on website actions, which Pinterest Audience Manager then uses to create custom audiences, such as those who viewed specific products or added items to their cart. Enhanced Match is crucial for improving audience matching by allowing advertisers to send hashed customer data (like email addresses) along with the Pinterest tag events, leading to a higher match rate between website visitors and Pinterest users. The Conversions API is used for sending server-side conversion data, not directly for audience creation based on site behavior. The Pinterest Shopping API is for managing product catalogs and shopping features, not for building behavioral audiences.