Debug tools

1. Inspect window.dataLayer (fastest)

In the browser console:

window.dataLayer
// → array of every event pushed since page load

Filter:

window.dataLayer.filter(e => e.event === 'purchase')

Live tracer (paste in console):

const _origPush = window.dataLayer.push.bind(window.dataLayer);
window.dataLayer.push = function(...args) {
  console.log('%c[dataLayer]', 'color:#5046e5;font-weight:bold', args[0]);
  return _origPush(...args);
};

2. Chrome extension — Google Tag Assistant

Install: Tag Assistant Companion.

Shows:

• All GTM tags firing.
• Variables and triggers.
• GA4 events sent.

3. GTM Preview Mode

Once the agency shares a preview link:

• Click Preview in GTM → enter the URL https://biosphereskincare.com/sw/en.
• Browse the site → a debug pane lists every event with its parameters.

4. Meta Pixel Helper

Install: Meta Pixel Helper.

Shows in real-time every fbq event with its parameters and warnings (missing fields).

5. Meta Events Manager — Test Events

URL: https://business.facebook.com/events_manager2.

Test Events tab → enter https://biosphereskincare.com/sw/en.

Live display of:

• Browser-side events (Pixel)
• Server-side events (CAPI)
• Deduplication (Pixel + CAPI matched via event_id)
• Event Match Quality (EMQ score 0-10)

Target EMQ for Purchase: ≥ 8.

6. GA4 DebugView

URL: https://analytics.google.com → GA4 property → Configure → DebugView.

Real-time event display. Enable debug mode via:

• Chrome extension GA Debugger
• OR push debug_mode: true in GA4 config tag (agency-side).

7. GA4 Realtime

Realtime → events show up within a minute. Less detail than DebugView but useful as a sanity check.

8. Stape logs (agency side)

The agency reads Stape logs to inspect inbound server-side hits and outbound calls to Meta / Google APIs.

Debug checklist per event

Check	Tool
Event in dataLayer	Console: window.dataLayer
Parameter types correct	Console
GTM Web sees it	GTM Preview Mode
Meta Pixel forwards it	Meta Pixel Helper
Meta CAPI receives it	Events Manager → Test Events
Pixel + CAPI deduplicated	Events Manager → Overview
GA4 receives it	GA4 DebugView
GAds conversion fires	Tag Assistant + Ads Manager → Conversions