How does your system decide which ads to serve in my app?

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After our system retrieves a pool of advertising campaigns that match your publishing campaign targeting conditions, it serves your game an ad from the best-performing campaign, as defined by eCPM. In the Chartboost network, eCPM is a combination of an advertising campaign's Install Rate (IR), Click-Through-Rate (CTR), and bid that reflects the overall competitiveness of the campaign.