The number of people who saw your ads at least once. Reach is different from impressions, which may include multiple views of your ads by the same people.
Your reach can be affected by your bid, budget and audience targeting.
In general, we have two type of Reach:
Organic reach and organic impressions show the number of unique users that saw your content or the number of times your content was displayed with no cost for you.
Just like the category name implies, paid reach and impressions are the results of your paid efforts, such as Facebook Ads.
The number of times your ads were on screen.
Impressions from certain placements are accredited by the Media Rating Council (MRC).
How It’s Calculated:
An impression is counted as the number of times an instance of an ad is on screen for the first time. (Example: If an ad is on screen and someone scrolls down, and then scrolls back up to the same ad, that counts as 1 impression. If an ad is on screen for someone 2 different times in a day, that counts as 2 impressions.) This method of counting video impressions differs from industry standards for video ads. With the exception of ads on Audience Network, impressions are counted the same way for ads that contain either images or video. This means that a video is not required to start playing for the impression to be counted.
In a few cases when it can’t be determined whether ads are on screen, such as on feature mobile phones, impressions are counted when ads are delivered to devices.
Impressions aren’t counted if they come from invalid traffic we detect such as from non-human sources (such as a bot).