NO MIDES el 40% de tus Conversiones Y NO LO SABES ❌

20 Apr 2026 · 13 min
13:05

In this solo tutorial, Carlos David López García warns that e‑commerce businesses typically miss measuring 30‑40 % of their conversions, a blind spot that can lead to misguided decisions, undervalued client performance, and wasted ad spend. He explains the two main sources of loss – cookie‑consent rejection and JavaScript blocking (especially on iOS devices) – as well as payment‑gateway redirects that prevent the thank‑you page from firing. To quantify the gap, he walks through a practical, platform‑agnostic workflow: export all orders from the store (e.g., PrestaShop) and the corresponding GA4 transaction report, paste both datasets into Google Sheets, clean formatting, and use lookup formulas (VLOOKUP/IFERROR) to match order IDs. He then aggregates monthly revenue and order counts with SUMIFS/COUNTIFS, calculates the percentage difference between web‑recorded and GA4‑recorded figures, and demonstrates how to extrapolate true sales using a simple rule‑of‑three. The video concludes with recommendations: adjust ROAS targets to account for the measured loss, consider advanced cookie‑less offline measurement software (which his team offers), and continuously monitor the gap as it can grow over time. A template spreadsheet is provided in the description for viewers to replicate the analysis.

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