A CMK enhances email marketing campaigns by: - Improving Targeting: With accurate customer data, you can create more targeted email campaigns. - Personalization: Personalized emails lead to higher engagement rates. A CMK allows for better personalization by tracking customer preferences and behaviors. - Customer Retention: By understanding the customer journey, you can create campaigns that address specific pain points, leading to better customer retention. - Performance Metrics: Track the performance of your email campaigns more effectively by analyzing data linked to the CMK.