What are impressions in online advertising?
Impression refers to each individual display of an ad format – whether it is a banner, video, or other visual content – on the user's screen while browsing a website or application. Each time the ad loads and is displayed, one impression is recorded, regardless of whether the user clicks on it or not.
How do impressions work?
Impressions are one of the fundamental metrics for measuring the reach of online advertising campaigns. They track, how many times the ad was actually displayed, providing an overview of how many people may have encountered the advertising content. However, it is not a measure of interaction – unlike clicks, which measure a specific user action, an impression only indicates that the ad was visually present.
Although one impression does not automatically signify interest or reaction, a high number of impressions can contribute to greater brand visibility and increase the number of conversions in the long run.
Why are they important?
Even though impressions alone are not the main indicator of campaign success, they play a key role in:
- building brand awareness (brand awareness),
- evaluating the reach of ad formats,
- optimizing the advertising budget,
- increasing the likelihood of conversions with a sufficient number of repeated views.
In marketing strategies, the number of impressions is often combined with other metrics, such as CTR (click-through rate), conversion rate, or ROI, to gain a comprehensive view of campaign performance.
Impressions vs. Clicks – what is the difference?
- Impression = the ad was displayed (the user may have seen it, but did not have to).
- Click = the user actively responded to the ad and went to the landing page.
While clicks are directly related to user activity, impressions map passive exposure of the audience to the advertising content. Both metrics have their significance, but their combined analysis provides a much more accurate picture of campaign effectiveness.