What is fill rate?

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Fill rate is the ratio of how many requested ads were actually delivered.
  • Fill rate percentage = (ads delivered / ads requested) × 100
  • Fill rate depends on how many advertising campaigns are running on Chartboost's network at that given time.
  • Fill rate can also be affected by targeting settings in your campaign (e.g. location, devices, exclusion lists), connectivity issues, timeouts, download performance, and Chartboost's ad server logic.
  • If you're in a country with low fill rate, you may face fill rate issues when trying to serve impressions.