"Site speed doesn't affect AdSense earnings" — wrong
Heard a guy swear speed is "only an SEO thing, ads load whenever."
No. Slow pages = ads render below the fold AFTER the user already bounced = lost viewable impressions = lower RPM. The auction can't pay for an impression nobody saw.
I lazy-loaded images and deferred a chat widget, dropped LCP from 4.1s to 2.3s. Viewability went 58% → 74%, RPM up 16% with zero ad changes.
Faster pages literally print more viewable impressions.
Fix your Core Web Vitals, then look at units. Test it on one page first.
AdSense Trenches
@AdSenseTrenches
"Site speed doesn't affect AdSense earnings" — wrong
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