What does the term 'unsubs' refer to in email marketing?

In email marketing, the term 'unsubs' specifically refers to the total number of users who unsubscribe from an email list. Monitoring unsubscribes is crucial for marketers as it provides insights into the effectiveness of their email campaigns and overall audience engagement. A high unsubscribe rate may indicate issues with email content, frequency, or relevancy, prompting marketers to reassess their strategies to enhance retention. Understanding this dynamic can help improve future campaigns and maintain a healthier email list.

The other options pertain to different metrics within email marketing analytics, such as bounce rates, revenue generation, or engagement through link clicks, but they do not relate to the concept of unsubscribing from an email list.