Which of the following statements about the audience planning tool is INCORRECT.

The correct answer is "Advertisers can use the audience planning tool to request insights from other brands" because this statement is incorrect. The Amazon audience planning tool is designed to provide advertisers with insights related to their own brand and customer base, not to request data or insights directly from other brands. Its purpose is to help advertisers understand their audience engagement across the customer journey and optimize their campaigns. The statement "Advertisers can only use the audience planning tool to understand insights surrounding their own brands" is a correct description of its functionality, as it focuses on proprietary data and Amazon's aggregated insights relevant to the advertiser's products. The tool does assess estimated customer engagement at various journey stages, making the first option a correct statement about its capabilities.