Energizer emphasizes the importance of a relationship marketing. Why?

Energizer emphasizes the importance of a relationship marketing. Why? Relationship marketing builds brand loyalty, interaction and long-term engagement from consumers. Energizer used this method from the beginning wanting to connect with their audience and build one-on-one relationships. The Energizer Bunny came about to promote their brand and customers connected and now recognize the Bunny as part of Energizer.