Optimized Traffic Allocation Last Update: February 20, 2017 23:34 If you have more than one creative set, Chartboost will by default allocate more impressions from higher-performing creative sets. But you can manually decide what percentage of impressions are shown from which of your creative sets. Select your advertising campaign. Go to your campaign's advanced settings. Uncheck Optimize Traffic Allocation (Recommended) and choose the percentage of traffic that will use each of your creative sets. Click Save. To revert to automatic traffic allocation, check Optimize Traffic Allocation (Recommended).