Google analytics impressions show how much time your ads are shown on a SERP or other site on the Google networks.
When your ads displayed on Google or the Google network, it's counted as one impression.
An impression is counted when your ad is shown on a research result page or different web site on the Google Network. when your ad seems on Google or the Google Network, it's counted jointly impression. https://www.hashmicro.com
An impression is counted each time your ad is shown on a search result page or other site on the Google Network. Each time your ad appears on Google or the Google Network, it's counted as one impression.
A link URL records an impression when it appears in a search result for a user. Whether or not the link must actually be scrolled into view or otherwise visible depends on the type of search element that contains the link.