Post-purchase marketing automation is a strategy used by businesses to engage with customers after they've made a purchase, build trust with the company, and potentially upsell or cross-sell. This can be achieved through various channels such as email, SMS, in-app notifications, push notifications, and physical mail. By using automation tools, businesses can personalize their communication with existing customers without losing the human touch. Examples of post-purchase marketing automation include sending educational content while waiting for a product to arrive, asking for feedback, letting customers know what comes next, and keeping them involved throughout the entire process. Businesses should consider their goals, available data or triggers, and necessary tools when designing their first automation.