universal app campaign seeing gradual drop in impressions
I have a universal app campaign running for my app. For the last two weeks i have seen a drop in my impressions, clicks and conversions. this is not a small drop, but figures touching 50% each week, for the last 3 weeks.
CTR has dropped by a lot less (10%). Ironically, conversion rate has improved by 5%. Is this drop in impressions on the GDN due to optimization and improvement in targeting?