In the context of Facebook Ads, “reach” and “impressions” are both metrics used to measure the performance and visibility of your advertisements, but they represent slightly different aspects.
Reach:
Impressions:
In summary:
These metrics are important for advertisers to understand how many people they are reaching and how frequently their ad is being seen. They help in evaluating the effectiveness of an advertising campaign and making adjustments to optimize its performance based on these insights.