Unsubscribe rate refers to the percentage of recipients who choose to opt-out or unsubscribe from a company's communications after receiving a message, such as an email, SMS, or push notification. This metric is calculated by dividing the number of unsubscribe requests by the total number of messages delivered, then multiplying the result by 100 to get a percentage.
Monitoring the unsubscribe rate is crucial for mobile marketers as it provides insights into the effectiveness and relevance of their messaging. A high unsubscribe rate may indicate that the content is not meeting audience expectations or that the frequency of messages is too high, prompting recipients to opt-out.