A fitness brand wants to expand their customer base by finding new shoppers similar to their highest-spending customers based on purchase amount. Which audience strategy should they use?

A lookalike audience in Amazon Marketing Cloud is designed to expand reach from a defined seed audience. Using highest-spending customers as the seed helps identify new shoppers with similar purchase and shopping patterns. This supports acquisition because the audience extends beyond known buyers while preserving relevance to high-value behavior. Purchase amount is an appropriate signal for defining the source audience before lookalike modeling.