What are Impressions? Aitarget Help Center May 04, 2016 06:40 Updated Follow One impression is one display to 1 person. The number of displays in the statistics is not unique. Related articles What is the difference between Clicks and Website Clicks? What is the difference between CPC, CTR, CPM, CPT? What is Relevance Score? Ads you cannot run on Facebook Creating Custom Audiences Comments 0 comments Please sign in to leave a comment.