Prebid SDK bids via PBS, caches winner in-memory 15 and passes hb_pb keywords to AdMob/MAX. Waterfall tries each tier: PrebidAdapter checks keyword-to-eCPM match. Match = render from cache; mismatch = instant no-ad, next tier.
FIELD NOTES
- ~200 events at 0.10 granularity per format; setup overhead
- No remote cache fetch unlike 15 — renders from SDK memory
- Keyword-to-eCPM mismatch = silent zero revenue, no error logged