80% CTR would be stupidly high, mobile app or not, anything over 5% would already be incredibly good. The 80% figure is fill rate (AKA the percentage of impres

80% CTR would be stupidly high, mobile app or not, anything over 5% would already be incredibly good. The 80% figure is fill rate (AKA the percentage of impressions to requested placements), the 1.80-2.00% figure is the CTR, which matches the third column being impressions and fourth clicks.