Reach

In advertising, Reach refers to the total number of distinct individuals or households exposed to a particular advertisement, piece of content, or an entire Campaign at least once during a specified period. It measures the breadth of an ad's exposure. Reach is different from Impressions, which count the total number of times an ad is displayed (one person can see an ad multiple times, contributing to multiple impressions but only one to reach). Maximizing reach is often a key objective for Brand Awareness campaigns. It's often considered alongside Frequency.