What does an established track record of user engagement indicate in Audience Sizing (IC)?

An established track record of user engagement suggests that users have consistently interacted with previous messages or content, demonstrating their interest and responsiveness to the brand's communication efforts. This historical data is a strong predictor of future behavior, indicating that these users are likely to engage with similar messages in the future. When audience sizing takes this engagement into account, it helps marketers to focus their efforts on people who have shown a positive response in the past, thus increasing the likelihood of effective communication and better campaign outcomes.

In contrast, the other options reflect negative indicators that do not align with user engagement. If users were indifferent to messages sent, it would imply a lack of engagement rather than a positive outlook for future interactions. Similarly, a long period of inactivity would suggest that users are not involved or interested, whereas a high unsubscribe rate would directly point to a disengagement from the content being provided. Hence, these scenarios would not support the notion of user engagement but rather indicate areas where marketing efforts may need improvement or re-evaluation.