What are Impressions? Aitarget Help Center September 23, 2017 08:55 Updated Follow One impression is one display to one 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? Creating a Facebook Pixel Ads you cannot run on Facebook What is Relevance Score? Comments 0 comments Please sign in to leave a comment.