For onclick ad formats (pop), an impression is counted when a tab fully loads with the advertisement visible. Please note that if a user closes the tab without visiting it, it will not be counted as an impression.

For display ad formats (banner, in-page, video), an impression is registered when a user views the creative. For example, when a user visits your website and sees a banner, it counts as an impression. Clicking on the banner redirects the user to the ad page, which is counted as a click.

It's important to note that viewability is crucial for display ad formats, so placing banners in better positions can lead to higher earnings.