What does an impression mean in marketing?

In marketing, an impression refers to the instance when an advertisement or piece of content is displayed to a user, regardless of whether they engage with it or not. This metric is crucial for understanding the reach and visibility of a marketing campaign. To elaborate, what exactly does the term ""impression"" signify in the context of marketing? Additionally, how does this concept play a role in evaluating the effectiveness of advertising strategies? In summary, the term ""impression"" in marketing denotes the moment an ad or content is shown to a potential viewer, which is essential for assessing the campaign's reach and impact. Understanding this concept helps marketers gauge the effectiveness of their advertising efforts.