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UTM marketing attribution reports with Google Sheets, GPT-4o & Gmail

Workflow preview

UTM marketing attribution reports with Google Sheets, GPT-4o & Gmail preview
Open on n8n.io

Important notice

This workflow is provided as-is. Please review and test before using in production.

Overview

Description

Turn raw marketing data into actionable insights with this n8n Source/UTM Attribution and Reporting workflow! It automatically aggregates lead submissions, calculates Cost Per Lead (CPL) per channel, and generates AI-powered weekly attribution reportsโ€”delivered straight to your inbox in a professional HTML format.

What This Template Does

๐Ÿ“… Runs hourly to process new lead submissions ๐Ÿ“Š Aggregates leads by source (Instagram, LinkedIn, Google Ads, etc.) ๐Ÿ’ฐ Calculates key metrics like Cost Per Lead (CPL) ๐Ÿง  Uses AI to generate executive-ready HTML reports ๐Ÿ“ˆ Highlights top-performing sources and growth opportunities ๐Ÿ“ง Sends polished reports via Gmail automatically

Prerequisites

  • Google Sheets with lead submission data
  • Google Forms (or similar) as the data input source
  • n8n instance (self-hosted or cloud)
  • Azure OpenAI (GPT-4o-mini) API key for AI-powered reporting
  • Gmail API credentials for automated report delivery

Step-by-Step Setup

  • Trigger workflow hourly with n8n Scheduler.
  • Fetch new lead submissions from Google Sheets.
  • Aggregate and group data by Source/UTM parameters.
  • Calculate CPL using spend + lead count per channel.
  • Standardize column names for consistent reporting.
  • Send raw + aggregated data to Azure OpenAI for report generation.
  • Format into a professional HTML report (with insights & recommendations).
  • Send report via Gmail node to stakeholders.

Customization Ideas

  • Replace Gmail with Slack/Teams notifications for real-time sharing.
  • Add visual charts (Google Data Studio / Looker) for more analytics.
  • Use additional UTM fields (campaign, adgroup, creative) for deeper granularity.
  • Extend reporting to include ROI and ROAS calculations.

Key Benefits

โœ… Hands-free attribution tracking and analysis โœ… Accurate CPL metrics per channel โœ… AI-generated reports with actionable insights โœ… Saves time vs. manual data crunching โœ… Weekly reports ensure marketing strategy stays optimized

Perfect For

  • Marketing teams managing multi-channel campaigns
  • Agencies providing client attribution reports
  • Business owners optimizing ad spend efficiency
  • Growth teams tracking lead quality by source