🚀 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 Node Description Endpoint / Logic 🕓 Schedule Trigger Runs daily at 00:00 Cron 0 0 * * * 📦 Get Product Feed Pulls product data from Channable or custom API GET {{$env.CHANNABLE_API_URL}}/v1/projects/{{$env.PROJECT_ID}}/items 🧮 Split Into Batches Processes 50 products at a time Avoids rate limits ✍️ Generate Ad Copy (Relevance AI) Calls AI tool for each product POST {{$env.RELEVANCE_AI_API_URL}}/tools/google_text_ad_copy_generator/run 🔍 Validate Character Limits JS validation (≤30 headline / ≤90 description) Truncates smartly 🧠 Compliance Check Agent Verifies Google Ads compliance POST {{$env.RELEVANCE_AI_API_URL}}/agents/google_ads_compliance_checker/run ⚖️ IF Compliant Routes APPROVED vs REJECTED "contains 'APPROVED'" 💾 Format for CSV Formats compliant ads for export Maps ID, headline, desc, URLs 📊 Aggregate Batches Combines all results Merges datasets 🧱 Generate CSV File Converts JSON → CSV Escaped string-safe format 📑 Save to Google Sheets Saves reviewed ads Sheet: Generated Ads 📢 Slack Notification (Success) Posts completion summary Shows ad count, timestamp 🚨 Slack Alert (Non-Compliant) Notifies team for review Includes issues, category 🔑 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 Manual Trigger: Disable the schedule → click “Execute Workflow”. Batch Size: Start small (3 products). 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 product_id headline description final_url display_url generated_at 12243 “Eco Bamboo Socks” “Soft, breathable comfort for everyday wear.” https://shop.com/socks shop.com 2025-10-22T00:00:00Z 📬 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 Frequency Task Daily Check Slack alerts for rejects Weekly Review ad performance metrics Monthly Update Relevance AI prompts Quarterly Refresh API tokens and variables 📊 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 Deploy and monitor for 7 days. After 30 days → activate Workflow 2: Performance Optimization Loop . Extend to Shopping Feed Optimization . Add multi-language generation using Relevance AI. 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.