How are Impressions calculated in the context of a marketing campaign?

Impressions in the context of a marketing campaign are a metric that measures how many times an advertisement or piece of content is displayed to users. The correct understanding of impressions focuses on the visibility of the content rather than user interaction with it.

In this case, the number of users who reported delivery indicates the instances where an advertisement was successfully delivered to a user. This aligns with the definition of impressions, as it counts how often the content is shown, regardless of whether users engaged with it or took further actions, such as clicking or unsubscribing.

Other options, such as user engagement, clicks on a website, and the number of users unsubscribed, represent different metrics that measure interaction or outcomes but do not directly reflect the count of how many times the content was presented to users. Therefore, understanding impressions as a measure of delivery is key to accurately defining this concept in marketing metrics.