Churn or attrition detection refers to the process of identifying and predicting the rate at which customers or employees leave a company or organization. This involves analyzing data and patterns to determine the likelihood of individuals discontinuing their relationship with the company, whether it be through canceling subscriptions, terminating employment, or ceasing to use services. By detecting churn or attrition, companies can take proactive measures to retain their customers or employees, ultimately improving their overall retention rate and reducing potential losses.