🚀 Channable + Google Ads + Relevance AI: Scalable AI Workflow for Automated Ad Copy Generation & Publishing

🧩 Overview

This workflow automates the entire ad creation process for Google Ads by integrating product data, AI-generated copy, compliance checks, and publication into your marketing pipeline.

It connects n8n, Relevance AI, Google Sheets, and optionally Channable to:

• Fetch product data from your catalog
• Generate Google Text Ad headlines and descriptions using Relevance AI
• Validate character limits and ensure Google Ads compliance
• Route non-compliant ads to a Slack review channel
• Save compliant, ready-to-publish ads in Google Sheets
• Notify your marketing team automatically after each generation cycle

🧠 Key Benefits

✅ 100% automated ad copy pipeline
✅ AI-generated, human-quality Google Ads text
✅ Built-in compliance verification (Google Ads policy)
✅ Google Sheet integration for team review
✅ Daily automatic schedule (zero manual effort)
✅ Slack alerts for QA and transparency
✅ Modular design — extendable for Shopping and Performance Optimization
✅ Scalable for 10 → 10,000+ product ads

⚙️ System Architecture

Tech Stack

• n8n – Automation Orchestrator
• Relevance AI – AI tools for copy generation and policy compliance
• Google Sheets – Data storage and team collaboration
• Slack – Real-time alerts and notifications
• (Optional) Channable – Product feed integration

🧭 Workflow Logic

Daily Trigger (00:00)
   ⬇️
1️⃣ Get Product Feed (Channable or custom API)
   ⬇️
2️⃣ Split Into Batches (50 products each)
   ⬇️
3️⃣ Generate Ad Copy (Relevance AI tool → Claude 3.5 prompt)
   ⬇️
4️⃣ Validate Character Limits (JS node: max 30 headline / 90 description)
   ⬇️
5️⃣ Compliance Check (Relevance AI agent → Google Ads policies)
   ⬇️
6️⃣ IF Compliant → CSV / Google Sheets
    ↳ ❌ Non-Compliant → Slack Alert
   ⬇️
7️⃣ Aggregate Batches + Generate CSV
   ⬇️
8️⃣ Save to Google Sheets (“Generated Ads” tab)
   ⬇️
9️⃣ Slack Notification → Summary Report

📋 Environment Variables

Set these in n8n → Settings → Variables → Add Variable

Copy-paste from your ENVIRONMENT_VARIABLES_CORRECTED.txt.

Includes:

• ✅ Relevance AI region, API key, tool & agent IDs
• ✅ Google Ads, Merchant Center, and Sheets credentials
• ✅ Slack channel name
• ✅ Optional Channable endpoint

Example:

RELEVANCE_AI_API_URL=https://api-f1db6c.stack.tryrelevance.com/latest
RELEVANCE_TOOL_AD_COPY_ID=bueQG8io04dw
RELEVANCE_AGENT_COMPLIANCE_ID=xT29mQ4QKsl
GOOGLE_SHEET_ID=1q2w3e4r5t6y7u8i9o0p
SLACK_CHANNEL=#google-ads-automation

🏗️ Node-by-Node Breakdown

🔑 API Authentication Setup

🔹 Relevance AI

• Create “HTTP Header Auth” credential

  Header Name: Authorization
  Header Value: Bearer {{$env.RELEVANCE_AI_API_KEY}}
  

🔹 Google Sheets

• Credential type: “Google OAuth2 API”

• Scopes:

  https://www.googleapis.com/auth/spreadsheets
  https://www.googleapis.com/auth/drive.file
  

🔹 Slack

• Create Slack App → Add Bot Token Scopes → chat:write
• Paste token in n8n “Slack API” credential.

🔹 (Optional) Channable

• Header Auth:

  Bearer {{$env.CHANNABLE_API_TOKEN}}
  

🧩 Google Sheet Template

Sheet name: Generated Ads

Columns:

| product_id | headline | description | final_url | display_url | generated_at |

Optional: Add compliance_status or notes columns for QA.

⚙️ Testing Procedure

1. Manual Trigger: Disable the schedule → click “Execute Workflow”.

2. Batch Size: Start small (3 products).

3. Expected Output:

   • ✅ Ad copy generated
   • ✅ Character limits validated
   • ✅ Slack alerts for rejects
   • ✅ Google Sheet filled

Check logs in Executions for errors.
Re-enable the cron trigger after successful validation.

🧾 Example Output

📬 Slack Alert Templates

✅ Success Notification

✅ *Google Ads Generation Complete*

📊 *Summary:*
• Total Ads Generated: 50
• Saved to Google Sheets: Generated Ads
• Timestamp: 2025-10-22T00:00:00Z

⚠️ Non-Compliant Alert

⚠️ Non-Compliant Ad Flagged

Product: Bamboo Socks
Issues:
- Contains “Free Shipping”
- Headline too long

Timestamp: 2025-10-22T00:00:00Z

🧰 Maintenance & Monitoring

📊 Success Metrics

• ✅ Compliance approval rate: >85%
• 🚫 Disapproval rate: <5%
• 📈 CTR improvement: +15–25%
• ⏱️ Time saved: 10–15 hours/week
• 🌐 Scalable: 1,000+ ads/day

🪜 Next Steps

1. Deploy and monitor for 7 days.
2. After 30 days → activate Workflow 2: Performance Optimization Loop.
3. Extend to Shopping Feed Optimization.
4. Add multi-language generation using Relevance AI.
5. Integrate Google Ads API publishing (full automation).

🔗 Resources

• n8n Docs
• Relevance AI Docs
• Google Ads API
• Merchant API
• Channable Help

🎉 Conclusion

You now have a production-ready, scalable AI-powered ad generation system integrating
Channable, Google Ads, and Relevance AI — built entirely on n8n.

This delivers:

• 💡 AI creativity at scale
• ✅ Google Ads policy compliance
• ⚙️ Hands-free daily automation
• 📊 Transparent reporting and collaboration

Start small → validate → scale to 10,000+ ads per day.
Within weeks, you’ll have a self-learning, always-on ad pipeline driving consistent performance.