Impressions in Google Ads represent the number of times your advertisements are displayed on Google's advertising network, including Google Search, YouTube, Google Display Network, and other Google properties. An impression is counted each time your ad appears on a user's screen, regardless of whether it is clicked.
Tracking impressions is fundamental for assessing the visibility and reach of your advertising campaigns. This metric allows advertisers to gauge how often their ads are being seen, which is critical for building awareness and exposure. By analyzing impression data alongside other performance metrics such as clicks and conversions, advertisers can gain insights into the effectiveness of their ads and optimize their strategies for better engagement and results.