Before you touch building a dataLayer that survives a redesign, run through this checklist. Skipping a step here is the usual reason numbers don’t match later.
- Where ga4 & gtm implementation usually breaks first in a live account.
- What to check before assuming the tracking tool is at fault.
- The minimum setup that holds up once traffic or campaigns scale.
This is part of what we handle under GA4 & GTM Implementation at FunnelSheet. If this sounds like your setup, get in touch.