Reach is the total number of unique users who have been exposed to your ad or content at least once. Unlike impressions, reach counts each person only once regardless of how many times they saw your ad.
Reach helps you understand:
If one person sees your ad 5 times, that's 5 impressions but only 1 reach.
Reach is the total number of unique people who see your ad. It's the foundation metric of brand awareness campaigns and determines the size of your potential audience. Understanding reach helps you plan budget, estimate market coverage, and avoid over-saturating small audiences with too much frequency.