Playbooks, teardowns, and tools for people who own the tracking.
Twelve years of F500 analytics engineering, written up. GTM, GA4, Consent Mode v2, Core Web Vitals, PCI DSS 4.0, DPDP 2023. No gated PDFs, no ebook-for-your-email, no sales call. Everything here is free.
Three ways in, depending on how you learn.
Signup to first alert is under an hour on any of them.
Getting Started guide.
Full walkthrough: install the snippet, configure your first synthetic journey, see the first alert land. Assumes zero prior monitoring experience.
start reading →5-minute install.
One async script tag, installed directly in your site’s HTML <head>. Not through GTM. From the first pageview we auto-discover every pixel, GA4 event, Consent Mode signal, and Core Web Vital you have in production.
open docs →Live demo dashboard.
A live dashboard with real data: tag health, incidents, Core Web Vitals, consent compliance. Look at the product before you hand over an email. No card, no sales call.
view demo →Audit your tracking stack in under two minutes.
Two-pass Playwright scan under default and consent-denied conditions. 155+ ad and analytics vendors detected, consent violations, PII leakage, multi-browser performance gaps, and CSP / cross-domain attribution issues. Editorial PDF in your inbox in under two minutes. Work email only. Free providers (Gmail, Yahoo, Outlook, iCloud) aren’t eligible. First scan free.
run my free audit →Guides that read like internal docs at a big analytics team.
First install up through running 50 containers for paying clients. 8 to 16 minutes each.
Getting Started with Tag Monitoring.
Signup to first production alert in five minutes. The same onboarding sequence I walk every enterprise customer through on the kickoff call.
beginner · 12 minGA4 monitoring.
The five GA4 events that break most often, success-rate math that survives a Black Friday spike, and the alerting thresholds senior analysts actually run in production.
intermediate · 14 minAgency operations at 10+ sites.
Run monitoring as a 90%-margin retainer line. Pricing tiers, SLA template, white-label report format, ops model for the account manager.
agency · 16 minWhen a tag breaks: incident response.
Copy-paste runbook for the ten minutes after the alert fires. Triage checklist, the six root-cause patterns, and a 30-minute postmortem template your team will actually fill out.
intermediate · 12 minFix your page speed: tag performance.
Which tags are adding 200 to 500ms to LCP and costing 2 to 4% of checkout conversion. Defer, remove, or replace, with revenue math your CFO will sign.
advanced · 14 minConsent compliance: GDPR, CCPA, DPDP.
Prove the CMP actually blocks tags. Audit Consent Mode v2 signals, GPC handling, pre-consent fires. The 2026 baseline across all three regimes, side by side.
compliance · 16 minTeardowns of the failure modes we see most.
~2,500-word deep-dives. Every one of these started as a real client ticket.
Why 18% of GTM tags fail silently every month.
GTM never tells you when a tag fails in production. Average container has 12 to 18% silent failure rate. The five modes GTM Preview will not catch, and how to detect them.
gtm · 10 min · 4 apr 2026Your Consent Mode v2 setup is probably broken.
In most containers we audit, 30 to 40% of tags fire regardless of consent state. The CMP is decorative, the GDPR exposure is real. How to verify yours in one afternoon.
compliance · 10 min · 2 apr 2026GA4 purchase event not tracking: 7 silent failures.
Purchase event fires fine in Preview. Two weeks later, GA4 reports 40% fewer transactions than Shopify. The seven silent failures behind that gap, ranked by how often we see them.
ga4 · 10 min · 31 mar 2026PCI DSS 4.0: your checkout scripts are a compliance obligation.
6.4.3 and 11.6.1 require a documented inventory of every script on your payment pages plus real-time change detection. Deadline was March 2025. What an assessor actually asks for.
security · 10 min · 28 mar 2026How your GTM tags are killing your Core Web Vitals.
A single badly-loaded remarketing pixel can add 300 to 800ms to LCP. The GTM container is quietly damaging organic rank. Which tags to fix first, with the P75 numbers.
performance · 10 min · 1 apr 2026Real-time monitoring vs manual GTM audits.
Manual GTM audit: 4 to 6 hours per client. By the time you deliver the deck, three tags have already broken. The hour-by-hour economics of moving to continuous monitoring.
agency · 10 min · 30 mar 2026Skip to whatever’s on your desk today.
Google Tag Manager.
Silent failures, container versioning, server-side migrations, multi-pixel monitoring.
5 articles →GA4 & Google Ads.
Purchase events, conversion failures, ad-blocker attribution gaps, Measurement Protocol fallback.
3 articles →Consent & privacy.
Consent Mode v2 signals, DPDP 2023 for India, CCPA plus GPC, running one CMP across regimes.
3 articles →Security & PCI.
Magecart detection, PCI DSS 6.4.3 and 11.6.1 evidence, script inventory, SRI hashing.
2 articles →Performance & CWV.
Core Web Vitals impact, P75 load-time benchmarks for 30+ scripts, BigQuery real-time export.
3 articles →Agency operations.
Governance at 50+ containers, white-label reports, client billing tiers, retainer defense.
4 articles →Things we built for our own workflow, then pushed out free.
No signup, no email wall.
UTM campaign builder.
Build consistent UTM-tagged URLs with platform presets for Google, Meta, LinkedIn, Twitter, Instagram, and newsletter. Keeps a history, generates in bulk, copies clean. The one we use internally.
live · free →Next off the internal toolbelt.
· GTM container diff viewer
· Consent Mode v2 validator
· Pixel fingerprint scanner
· dataLayer schema linter
21 long-form teardowns.
Silent tag failures, PCI DSS 4.0 evidence, DPDP Act, ad-blocker attribution, the things that break in week three.
Where to look next.
Done reading? See your own tracking in real time.
Install in 5 minutes, first alert lands today. 14-day free trial. No card, no sales call, cancel from the dashboard.