Tutorial 4: Google Ads Scripts — Automate Your Account Without an Engineering Team

What you’ll learn: How to write, install, and schedule Google Ads Scripts for automated campaign management. Includes 5 production-ready scripts from my open-source library that you can install in under 10 minutes.

The What: Scripts That Run Inside Google Ads

Google Ads Scripts are JavaScript programs that run inside the Google Ads platform. They can read your campaign data, make changes, send emails, write to Google Sheets, and run on a schedule—all without any external server or deployment infrastructure. For marketers who are not engineers, Scripts are the fastest path from manual campaign management to automation.

I have written hundreds of Google Ads Scripts over 15 years. The open-source scripts on my GitHub represent the ones that solved problems I encountered repeatedly across clients ranging from NortonLifeLock to Children’s Health to GLI apartment communities. Each one is tested in production on real budgets.

The Why: Stop Doing Manually What a Script Can Do in Seconds

Search Engine Land’s analysis documented that AI Max can cost $100.37 per conversion versus $43.97 for managed campaigns when left unattended. Scripts are your insurance policy. They monitor, alert, and act when the platform’s automation drifts off course.

The How: Install Your First Script

Step 1: Access Google Ads Scripts

# In Google Ads:
# 1. Click Tools & Settings (wrench icon)
# 2. Under 'Bulk Actions', click 'Scripts'
# 3. Click the blue '+' button to create a new script
# 4. Give it a name
# 5. Paste the code
# 6. Click 'Preview' to test (ALWAYS preview first)
# 7. Click 'Run' to execute
# 8. Set a schedule (hourly, daily, weekly)

Step 2: Script #1 — Anomaly Detection Alert System

This script monitors your account for sudden performance changes and emails you when something looks wrong. I built the original version after a tracking pixel broke on a Friday at NortonLifeLock and $15,000 was misspent over the weekend.

// Anomaly Detection Script
// Source: github.com/itallstartedwithaidea/google_ads_anomoly_detection_script

var CONFIG = {
EMAIL: '[email protected]',
THRESHOLD_PERCENT: 30,  // Alert if metrics change >30%
LOOKBACK_DAYS: 7,       // Compare to 7-day average
METRICS: ['Clicks', 'Cost', 'Conversions', 'CostPerConversion']
};

function main() {
var today = getDateRange(1);       // Yesterday
var baseline = getDateRange(CONFIG.LOOKBACK_DAYS);
var alerts = [];

var campaigns = AdsApp.campaigns()
.withCondition('Status = ENABLED')
.get();

while (campaigns.hasNext()) {
var campaign = campaigns.next();
var todayStats = campaign.getStatsFor(today.start, today.end);
var baseStats = campaign.getStatsFor(baseline.start, baseline.end);

// Check each metric for anomalies
CONFIG.METRICS.forEach(function(metric) {
var todayVal = todayStats['get' + metric]();
var baseAvg = baseStats['get' + metric]() / CONFIG.LOOKBACK_DAYS;
var change = baseAvg > 0 ? ((todayVal - baseAvg) / baseAvg) * 100 : 0;

if (Math.abs(change) > CONFIG.THRESHOLD_PERCENT) {
alerts.push({
campaign: campaign.getName(),
metric: metric,
today: todayVal.toFixed(2),
average: baseAvg.toFixed(2),
change: change.toFixed(1) + '%'
});
}
});
}

if (alerts.length > 0) {
sendAlertEmail(alerts);
}
}

📦 GitHub: https://github.com/itallstartedwithaidea/google_ads_anomoly_detection_script — Full script with email formatting, multi-account support, and configurable thresholds

Step 3: Script #2 — Budget Projection and Pacing

This script calculates whether you are on track to hit your monthly budget—and alerts you if you are overpacing or underpacing. Essential for any account over $10K/month.

📦 GitHub: https://github.com/itallstartedwithaidea/google_ads_budget_projection_script — Production budget pacing script with daily/monthly projections and Sheets output

Step 4: Script #3 — Negative Keyword Conflict Resolver

One of the most common and expensive Google Ads mistakes: adding a negative keyword that blocks your own positive keywords. This script detects those conflicts before they cost you money.

📦 GitHub: https://github.com/itallstartedwithaidea/google_ads_negative_keyword_conflict_script — Automatically finds negative/positive keyword conflicts across all campaigns and ad groups

Step 5: Script #4 — Impression Share Monitor

Tracks your impression share over time and alerts you when competitors are gaining ground. I built this to catch competitive surges early at Farmers Insurance.

📦 GitHub: https://github.com/itallstartedwithaidea/google_ads_impressionshare_script — Daily impression share tracking with competitive trend analysis

Step 6: Script #5 — Out-of-Stock Product Pauser

For eCommerce: automatically pauses ads for products that are out of stock, so you stop paying for clicks that cannot convert.

📦 GitHub: https://github.com/itallstartedwithaidea/google_ads_script_outofstock_items_script — Checks inventory feeds and pauses/enables product ads based on stock status

The So What: From Scripts to Agents

Each of these scripts solves one problem. GoogleAdsAgent.ai’s sub-agents solve these same problems but with AI-powered reasoning, cross-script coordination, and the ability to learn from patterns across all your campaigns simultaneously. The anomaly detection script alerts you to a problem. The Campaign Intelligence sub-agent alerts you, diagnoses the cause, and recommends or executes the fix.

But start with scripts. They are free, they run inside Google Ads, and they teach you the platform’s automation capabilities from the ground up. Every agent I built started as a script.

🔗 Resources

Website: https://googleadsagent.ai | GitHub: https://github.com/itallstartedwithaidea | Tools: https://googleadsagent.ai/tools

About the Author

John Williams is a Senior Paid Media Specialist at Seer Interactive with 15+ years managing $48M+ in digital ad spend across Google, Microsoft, Meta, and Amazon. Founder of It All Started With A Idea and creator of GoogleAdsAgent.ai. Speaker at Hero Conf on AI in advertising. Former WSU football player and current assistant football coach at Casteel High School, AZ.