Chrome’s cookie timeline is moving again

Hearing the updates about Chrome’s third‑party cookie phase‑out, I pulled 90‑day cohorts and saw retargeting reach down 11% WoW after Jan 10 on two mid‑market stores; modeled conversions in GA4 are filling about 35% of the gap. Anyone else seeing similar shifts, and are you leaning into first‑party events or server‑side tagging to stabilize attribution?

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Seeing mid-teens retargeting dips on two Shopify brands; GA4 ‘modeled conversions’ cover about 40% here and remarketing feels like it’s running on half a tank. Switching GA4/Ads to server-side GTM with Consent Mode v2 + Enhanced Conversions and pushing hashed-email audiences daily stabilized CPAs in 5–7 days — have you tried Protected Audiences yet?

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Quick win for us: moved GA4 + Google Ads to a GTM server‑side container on a first‑party subdomain and turned on Enhanced Conversions from checkout email; reach rebounded about 8% and modeled conversions cover about 50% since Jan 10. Small caveat: watch Cloud costs and dedupe ‘view_item’/‘add_to_cart’ across client/server — have you tried server‑side + EC yet, @alewis740?

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saw a similar post–Jan 10 dip; instead of infra changes, we ramped Google Ads Customer Match by auto‑syncing buyers and high‑intent signups from Klaviyo, which clawed back about 6–9% reach and stabilized CPA. Small caveat: match rates are list‑quality‑dependent and it takes a week to settle. @alewis740 or anyone else try pushing non‑purchaser segments into Customer Match yet?

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We pushed high‑intent non‑purchasers (cart/browse abandon + quiz/back‑in‑stock signups) into Customer Match and suppressed 2‑day converters; reach bounced about 7% and CPA stayed flat. Tip: normalize emails before upload (lowercase/trim) and refresh the list daily or match rate decays fast. @alewis740 are you batching daily or doing near‑real‑time updates?

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