End-to-end lead attribution: Ads → Contao → HubSpot → Sheets

I implement a reliable “click → form → CRM → spreadsheet” pipeline so every lead automatically stores:

utm_* fields

click IDs (gclid / gbraid / wbraid, optional fbclid)

optional landing page + referrer

Deliverables:

parameter capture + persistence (cookies/localStorage)

hidden field injection before submit

HubSpot Contact properties + form-to-property mapping

HubSpot workflow → Create Google Sheet row with column mapping

Outcome: consistent lead-level attribution in HubSpot and Sheets, ready for Ads optimization.

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