A forensic audit found the leak, and the problem ads couldn’t fix.

Part 1: Measurement rebuilt around one real sale

We rebuilt and published the Google Tag Manager container with custom events and a landing-variant dimension, corrected GA4’s channel grouping, added custom dimensions, and demoted every duplicate or miscounted conversion action so exactly one purchase action drives bidding. The rebuilt container went live and was verified the same evening.

• One primary purchase conversion; views no longer count as sales
• GTM rebuilt, published and verified in one evening
• Eight GA4 custom dimensions for landing and campaign analysis

Part 2: A forensic account audit, line by line

The audit was delivered as a written, client-ready assessment. It found a Demand Gen campaign buying orders at several times the target cost per acquisition, branded searches being bought at Performance Max prices, and ad copy pointing shoppers at the wrong product. Daily snapshots of Google and Meta campaign metrics now give every future audit a baseline.

• Wasted spend quantified campaign by campaign
• Brand demand separated from prospecting
• Every ad checked against the product it advertises

Part 3: A persona landing system for paid traffic

Four message variants run from one configuration, each written for an audience segment the ads already target. An ad-mode flag strips header navigation for paid visitors so clicks can’t wander away from the offer, a sticky mobile CTA serves an audience that is mostly on phones, and comparison, guide and FAQ sections answer objections before checkout. It runs on Cloud Run under the same tag container as the store.

• Variant routing from a single config, with legacy URLs redirected
• Ad-mode navigation stripping for paid clicks
• A per-variant analytics dimension, so every page is judged on purchases

Part 4: Attribution that survives the domain hop

The landing pages live on their own subdomain and checkout lives on Shopify, which is exactly where attribution usually dies. Every ad click ID and UTM is passed into store deep links, one tag container spans both domains so the journey stays in a single GA4 property, and Meta Pixel custom events make landing behavior usable for audiences and optimization without a redeploy.

• Google, Meta, Microsoft and TikTok click IDs preserved
• One GA4 property across landing pages and store
• Meta custom events ready for audience building

Part 5: The finding ads can’t fix

Joining ad-platform, GA4, server-log and order data exposed the real constraint: too few customers come back for a second order, so paid acquisition cannot pay back on a single purchase. Better bidding could not change that. We said so plainly: the next lever is retention, not bids.