Subscription churn is a significant challenge faced by businesses operating on a subscription model, as it directly impacts revenue and customer base. There are four types of churn - voluntary, involuntary, customer, and revenue churn - that can affect your business differently. Common causes of churn include bad offers, poor cancel flow, and seasonal patterns. A healthy monthly customer churn rate is generally considered to be between 2-4%. Proactive measures such as enhanced customer support or targeted promotions can help mitigate the impact of seasonal churn. Understanding and mastering metrics like subscriber churn rate, MRR churn rate, gross MRR churn rate, and net MRR churn rate is crucial for gauging business vitality. Togai, an advanced subscription billing system, can help reduce churn and improve the customer cancellation experience.