Hello, can you please me explain why 10 days ago, I had 1.87 € Impression RPM, and I earned 2.21 € with only 11 clicks, but today with 15 clicks I earned 1.13 €?
All click values vary largely. It depends on the advertiser’s bid per campaign, which will be based on many things like competition, budget, geos.
Its effectively outside of your control. Of course, if you target higher paying geos in your apps and have good quality traffic you can ensure higher RPMs in general.