Exam AD0-E602 topic 1 question 24 discussion

A retailer implements Adobe Real-Time CDP and is able to combine in-store purchase data with purchase data from their website using a phone number as the primary key. This retailer’s primary business goal for this year is to acquire new customers. The primary KPI is return-on-ad-spend (ROAS).
For which use-case could segmentation meet the business goal?