How to Set Up Google Ads Conversion Tracking Properly

Why Conversion Tracking Is the Most Important Thing in Your Account

Without conversion tracking, you're spending money on Google Ads with no way of knowing what's working. You can see clicks, impressions, and cost — but you can't see which keywords, ads, and campaigns are actually generating enquiries, phone calls, or sales.

That means every optimisation decision is a guess. You might pause a keyword that was quietly generating your best leads, or pour more budget into a campaign that gets lots of clicks but zero enquiries.

We audit dozens of UK small business accounts, and the most common issue we find isn't bad keywords or poor ad copy — it's missing or broken conversion tracking. It's one of the most costly Google Ads mistakes small businesses make. Fixing this single problem often transforms account performance.

What Should You Track?

Track every meaningful action a potential customer takes on your website. For most UK service businesses, that means:

Phone Calls

Phone calls are often the primary way customers make contact, especially for trades and local services. There are three types of call conversions to track:

Set a minimum call duration. A 5-second call isn't a real enquiry. For most businesses, setting the minimum to 60 seconds ensures you're only counting genuine conversations.

Form Submissions

If your website has a contact form, quote request form, or booking form, track every submission. This is typically done by tracking the "thank you" page that appears after submission, or by tracking the form submit event itself.

Other Conversions (If Applicable)

Setting Up Conversion Tracking: Step by Step

Method 1: Google Ads Conversion Tag (Recommended for Beginners)

This is the simplest method and works well for most small businesses.

For form submissions:

1. In Google Ads, go to Goals > Conversions > New conversion action
2. Select Website
3. Enter your website URL
4. Select "Submit lead form" as the category
5. Name your conversion (e.g., "Contact Form Submission")
6. Set the value (if you know your average lead value, enter it; otherwise leave as "Don't use a value")
7. Set the count to "One" (so repeat submissions from the same person don't inflate your numbers)
8. Google will give you a tag to install. You can install it manually, through Google Tag Manager, or through a CMS plugin

For phone calls from your website:

1. Go to Goals > Conversions > New conversion action
2. Select Phone calls > Calls to a phone number on your website
3. Enter your phone number
4. Set the minimum call length (we recommend 60 seconds)
5. Install the provided tag on your website

For calls from ads:

1. Go to Goals > Conversions > New conversion action
2. Select Phone calls > Calls from ads
3. Set the minimum call length
4. This works automatically if you have call extensions enabled

Method 2: Google Tag Manager (Recommended for Growing Businesses)

Google Tag Manager (GTM) gives you more flexibility and doesn't require editing your website code for each new tracking element.

Basic GTM setup:

1. Create a Google Tag Manager account at tagmanager.google.com
2. Install the GTM container code on your website (one-time setup)
3. In GTM, create tags for your Google Ads conversions
4. Set up triggers that fire when forms are submitted or thank-you pages load
5. Preview, test, and publish

GTM is particularly useful if you're also using Google Analytics, Facebook Pixel, or other tracking tools — you manage everything from one place.

Method 3: Import from Google Analytics

If you already have Google Analytics 4 (GA4) set up with events and goals, you can import these directly into Google Ads:

1. In Google Ads, go to Goals > Conversions > New conversion action
2. Select Import > Google Analytics 4 properties
3. Select the events you want to import
4. Save and apply

This is the cleanest approach if GA4 is already tracking your conversions properly.

Verifying Your Tracking Works

Setting up tracking is only half the job. You need to verify it's actually recording conversions correctly.

How to Test

1. Submit your own form: Fill in your contact form and check if a conversion appears in Google Ads within 24 hours (there's often a delay)
2. Call your own number: If tracking website calls, visit your site through an ad click, then call the number shown. Check if it registers.
3. Use Google Tag Assistant: Install the Chrome extension to verify your tags are firing correctly
4. Check the conversion status: In Google Ads, go to Goals > Conversions and check the status column. It should say "Recording conversions"

Common Verification Issues

Common Conversion Tracking Mistakes

Mistake 1: Not Tracking at All

The most common and most damaging mistake. Without tracking, you simply cannot optimise your account effectively. Every decision is uninformed.

Mistake 2: Tracking the Wrong Things

Counting page views or time on site as conversions inflates your numbers and misleads optimisation. Only track actions that represent genuine business leads.

Mistake 3: Not Setting a Minimum Call Duration

If every call — including 3-second wrong numbers and hangups — counts as a conversion, your data is unreliable. Set a minimum of 60 seconds.

Mistake 4: Counting Every Conversion Instead of One

If the same person submits your form three times, that's one lead, not three. Set your conversion count to "One" for lead generation. (Use "Every" only for e-commerce transactions.)

Mistake 5: Not Assigning Values

If you know your average lead value (e.g., an average customer is worth £500), assigning a value to your conversions lets Google Ads calculate return on ad spend (ROAS) — a much more useful metric than cost per conversion alone.

Mistake 6: Breaking Tracking During Website Updates

Every time your website is updated, check that your conversion tracking still works. New form plugins, redesigned pages, or developer changes can inadvertently break your tags.

What to Do With Your Conversion Data

Once tracking is working correctly, use the data to make informed decisions:

Identify your best keywords: Sort by conversions to see which keywords are generating actual enquiries. These deserve more budget.

Find the waste: Sort by cost with zero conversions to find keywords that are spending money without results. Reduce this wasted spend by pausing or adjusting these keywords.

Optimise your bidding: With enough conversion data (at least 30 conversions in 30 days), you can switch to automated bidding strategies like Target CPA, which uses your conversion data to bid more intelligently.

Improve your ads: Compare conversion rates across different ads. The ads with the highest conversion rates are speaking most effectively to your audience.

A Quick Conversion Tracking Checklist

• Form submissions are tracked (contact form, quote form, booking form)
• Phone calls from ads are tracked with a 60-second minimum duration
• Phone calls from your website are tracked (after ad clicks)
• Conversion count is set to "One" (for lead generation)
• Values are assigned if you know your average lead worth
• Tags are verified and showing "Recording conversions"
• Tracking still works after any website changes

Need Help Setting It Up?

Conversion tracking is technical, and getting it wrong is easy. If you'd rather have it set up properly the first time, request a free SwiftLead audit. We'll check your current tracking setup (or implement it from scratch), verify everything is recording accurately, and make sure your account has the data it needs to perform at its best.

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