This document analyzes data from over 120 million mobile users and 25,000 apps to evaluate mobile advertising formats and networks. It finds that rewarded videos generated the highest eCPMs, particularly from AdColony, Vungle, and Chartboost. Interstitials also increased and remained reliable, with top networks being OpenX, MoPub, and Amazon Ads. Video ads grew strongly, led by MoPub, Applovin, and Vungle. The document provides recommendations for implementing different ad formats effectively based on the analysis.