For developers monetizing mobile games with ads, what do you usually check first when revenue drops?
I’m trying to organize a practical checklist for small teams:
impressions
fill rate / match rate
eCPM
country mix
placement exposure
ad source / mediation source
My current thinking is that eCPM alone can be misleading.
If revenue drops but eCPM is stable, the issue may be fill, traffic, placement exposure, or country mix.
If traffic and fill stay stable but eCPM drops, then pricing, demand, or country mix may be more likely.
Curious how other mobile game developers debug this in practice. What is the first metric you check?