Reach and impressions are often confused but measure different things. Understanding the difference helps you interpret campaign performance accurately.

Definitions

View Definitions

Reach: The number of unique people who saw your content
Impressions: The total number of times your content was displayed

One person seeing your ad 5 times = 1 reach, 5 impressions

When Each Matters

  • Reach: Understanding audience size, avoiding over-frequency
  • Impressions: Total exposure, brand awareness campaigns
  • Frequency (Impressions/Reach): How often people see your content

Frequency Considerations

  • Too low: Not enough exposure to register
  • Optimal: 2-7 times depending on objective
  • Too high: Ad fatigue, wasted spend, annoyance

Platform Variations

Different platforms count impressions differently. Some count viewability thresholds, others count any load. Compare metrics within platforms, not across them.