Notes from the tracking bench.

What we learn measuring Shopify → Google Ads attribution — real data, real failures, real fixes.

2026·07·25 COMPARISONS 4 MIN READ

Coverage 100%, Match Rate 15%: The Number Client-Side Tracking Hides

Your Google Ads "Data quality" panel can show 100% coverage while match rate sits at 15%. A live same-store test shows why server-side tracking wins.

2026·07·25 TRACKING PROBLEMS 6 MIN READ

"Limited User-Provided Data" in Google Ads: Why We Show It on Purpose

The Google Ads "Limited user-provided data" warning explained — what Google discards, and why sending only ad-driven conversions is a deliberate choice.