______ is an audience planning tool that allows you to incorporate your own audiences into your Amazon Ads campaigns by onboarding directly into Amazon DSP.

The correct answer is Advertiser Audiences because this audience planning tool enables advertisers to integrate their own custom audiences into Amazon Ads campaigns by directly onboarding them into Amazon DSP (Demand-Side Platform). This functionality allows brands to leverage their existing customer data to create targeted advertising strategies on Amazon, enhancing the effectiveness of their campaigns by reaching users who are already familiar with their products or services. In contrast, Media Planning focuses on strategizing the placement and timing of ads, while Amazon Attribution is primarily used for measuring the impact of marketing efforts across different channels, making Advertiser Audiences the most suitable choice for this context.