Blog
Analysis, field notes and best practices to protect your e-commerce revenue.
E-commerce go-live checklist to prevent breakage
An e-commerce go-live checklist: what to check before, right after and within 72 hours of a release so a new theme or update doesn't break tracking or checkout.
Read the article October 29, 2026 · 8 minMeta Pixel not tracking purchases: how to diagnose it
Meta Pixel not tracking purchases anymore? A step-by-step diagnosis with Events Manager and Meta Ads Data Advisor, the usual causes and what it does to bidding.
Read the article October 19, 2026 · 6 minIncreasing e-commerce revenue: which lever to pull?
With the same traffic, two levers sell more: improve or repair. A calculation in euros to compare your projects and decide where to start.
Read the article October 6, 2026 · 6 minLeaking promo code: what it costs you per day
A leaking promo code eats into your margin every day. Here's how to spot it, put a euro figure on it and react fast.
Read the article October 1, 2026 · 5 minBlack Friday: your bugs cost 3 times more
During Black Friday, a bug costs 3 to 4 times more. The math, 3 real cases and the checklist of 5 journeys to check before your site freeze.
Read the article October 1, 2026 · 5 minYou have 200,000 replays. You watch 40.
Your session replay tools record everything. But the leak is buried in the mass, the error can't be reproduced, and every day you don't see it costs money. Here's how to get out of that loop.
Read the article September 21, 2026 · 4 minWhy GA4 and Datadog don't see what Korvus sees
GA4 measures your audience, Datadog monitors your tech stack: neither one puts a euro figure on a revenue leak. Here's what each one sees, what it misses, and what Korvus adds.
Read the article September 17, 2026 · 4 minRevenue Leak Management: the category that didn't exist
A leaking promo code, a broken checkout: your e-commerce site is losing money and nobody sees it. Meet Revenue Leak Management, the category that detects these leaks and puts a euro figure on them.
Read the article June 11, 2026 · 5 minBy Charlot: 18 days of invisible errors, 48 hours to fix them
How Korvus turned a hunch into a live fix in 48 hours: 1 in 10 visitors affected, €4,000 to €8,000 in lost revenue.
Read the article April 2, 2026 · 7 minBFCM 2026: the technical checklist 97% of online retailers ignore
Black Friday squeezes weeks of revenue into 96 hours. Pixels, performance, feeds, alerts: the week-by-week checklist so you don't burn your revenue peak.
Read the article April 2, 2026 · 6 minYour GTM container is a ticking time bomb: an audit guide for growth teams
After 2 years, a GTM container piles up 30 to 50 tags, 20 to 40% of them obsolete or duplicated. A non-technical audit guide to find what's breaking your data.
Read the article April 1, 2026 · 5 minThe 404 tax: what dead pages in your paid campaigns really cost you
Up to 25% of ads point to dead pages. Wasted budget, skewed attribution, inflated bounce rate: a by-the-numbers look at a silent leak.
Read the article April 1, 2026 · 7 minThe real cost of a skewed ROAS: when your budget decisions rest on broken data
A ROAS inflated or crushed by broken data leads to disastrous budget decisions. The cost comes from the misallocation that follows the technical error.
Read the article March 31, 2026 · 6 minJavaScript errors: the silent killer your backend monitoring can't see
94% of e-commerce sites have more than 5 unresolved JavaScript errors. They break your pixels, block your buy buttons and drag down your Core Web Vitals, and Sentry never flags them.
Read the article March 31, 2026 · 6 minYour TikTok pixel is probably broken: the diagnostic guide for e-commerce
The TikTok pixel has all the same problems as Meta (iOS, ad blockers) plus quirks that make it even more fragile. Full diagnosis and figures.
Read the article March 30, 2026 · 6 min1 minute of downtime = €10,000: how many times a month does your checkout crash?
The average cost of e-commerce downtime is €10,000 per minute. But checkout micro-outages (JS errors, API timeouts, a button that stops responding) slip past your backend monitoring.
Read the article March 30, 2026 · 6 minEnhanced Conversions: the promise of +30% data... if you didn't botch the implementation
Google is pushing Enhanced Conversions to recover 30% of lost data. But silent implementation errors are everywhere. Diagnosis and impact in euros.
Read the article March 29, 2026 · 6 minYour CMP is eating your data: when the cookie banner blinds your decisions
With cookie acceptance as low as 3 to 10% in strict implementations, your CMP can hide 40% of your traffic. An analysis of the impact on your media decisions.
Read the article March 29, 2026 · 6 minServer-side, client-side: why one doesn't replace the other
Server-side tagging is sold as the miracle cure for tracking. But it can't see what actually happens in the browser. A look at how the two complement each other.
Read the article March 28, 2026 · 5 minYour GA4 shows the wrong revenue (and nobody told you)
WooCommerce and PrestaShop inflate GA4 revenue by 10 to 30%. Duplicates, tax-inclusive instead of net amounts, missing currency: the errors are silent. Analysis and figures.
Read the article March 28, 2026 · 6 minEvery 100 ms of LCP costs you €X a month: the math nobody does
Amazon loses 1% of sales per 100 ms of latency. Vodafone gained 8% in sales by cutting its LCP by 31%. Turn your Core Web Vitals into the euros you lose every month.
Read the article March 27, 2026 · 6 minConsent Mode V2: how many conversions are you losing without knowing it?
Since July 2025, Consent Mode V2 has been mandatory in the EEA. Without a correct implementation, a huge share of your conversions silently disappears. The numbers.
Read the article March 27, 2026 · 7 minYour 3 platforms show 3 different numbers: which one is right, Meta, Google Ads or GA4?
Meta over-reports by 26%, Google Ads by 15-20%, GA4 under-reports by 18-35%. Why the gaps exist and when to worry.
Read the article March 26, 2026 · 12 minThe 7 data leaks draining your media budget
Dead pixel, zero-value purchases, misconfigured CMP, 404 pages, out-of-stock products, degraded LCP, wrong GA4 revenue: 7 leaks that cost mid-market e-commerce sites €50,000 to €200,000 a year.
Read the article March 26, 2026 · 4 minSmart Bidding and bad data: when your bids optimize on thin air
Automated bidding algorithms depend on the quality of your conversion data. What happens when that data is corrupted?
Read the article March 25, 2026 · 5 minWhat does an undetected dead pixel cost?
A conversion pixel that stops working can cost thousands of euros a day. A by-the-numbers look at the problem and how to avoid it.
Read the article March 25, 2026 · 4 minOut of stock + paid traffic: the silent waste
When your Shopping campaigns send paid traffic to out-of-stock products, every click is wasted budget. How to detect the leak and stop it.
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