After an MCM partner change, audit ads.txt AND sellers.json together. A correct ads.txt line with a missing or UNAUTHORIZED sellers.json entry still causes buyers who check both to skip you — it looks like a demand problem when it’s authorization.
Publisher monetization help: adsclap.com
Quick Ad Manager tip: After a redesign, fill can tank even when demand looks healthy.
Often ad units still request desktop sizes on mobile breakpoints — GPT keeps calling, but competitive bids never show up.
Audit live CSS breakpoints vs your GPT size map before you renegotiate floors.
adsclap.com
Publishers: soft Open Bidding fill often isn’t demand — it’s Unified Pricing Rules. A single floor on ‘all inventory’ can quietly block the partners you just enabled. Audit UPR by inventory type, then retest. More at adsclap.com
Publishers: before you blame soft demand, audit your GAM key-values.
Stale or overlapping custom targeting (old campaigns, leftover page metadata, duplicate keys) silently shrinks eligible demand and makes yield reports look worse than they are.
Clean unused key-values quarterly. Map each key to a real page or audience signal. Then re-check AdX/Open Bidding fill.
More publisher monetization help: adsclap.com
After an MCM partner switch, leftover ads.txt lines from the old network still get crawled. Buyers see conflicting sellers and AdX fill can quietly drop.
Audit ads.txt (and sellers.json) within 48 hours of any partner change — keep only active MCM entries.
adsclap.com
Publishers: if fill dips after a page redesign, check lazy-load thresholds before blaming demand. Aggressive lazy loading can tank viewability and make buyers skip the slot. Change one placement at a time and measure. More publisher tips: adsclap.com
Publishers: before you chase a new SSP, audit your GAM line items and frequency caps. Bloated delivery rules silently kill fill and RPM.
AdsClap helps publishers clean up Ad Manager and grow AdX revenue.
adsclap.com
Google Ad Manager tip: ads.txt is your first filter.
Keep it accurate so buyers can find and trust your inventory.
Publishers — join AdsClap (Google MCM Partner): adsclap.com



