Google Ads conversion tracking records what happens after someone clicks your ad — whether they call, fill in a form, or make a purchase. Without it, you cannot tell which keywords and campaigns drive actual business. It is non-negotiable for any serious Google Ads campaign.
Conversion tracking is the most important technical setup in Google Ads. Without it, you know how many clicks you got and what they cost — but not which clicks became actual leads or customers. Setting up conversion tracking correctly transforms Google Ads from a cost centre into a measurable revenue engine. This guide covers the full setup for South African businesses. Also see: How to set up a Google Ads campaign.
What is Conversion Tracking?
Conversion tracking is a piece of code (a tracking tag or event) that fires when a visitor completes a valuable action on your website after clicking a Google Ad. Google records this action as a ‘conversion’ and attributes it to the keyword, ad, and campaign that drove the click. This data powers Smart Bidding algorithms and allows you to measure your actual cost per lead or cost per sale.
Without conversion tracking, your Google Ads account is operating without feedback. You can see which keywords generated clicks, but you cannot tell which keywords generated actual enquiries. Campaigns optimised without conversion data are typically spending 30-50% of their budget on clicks that never convert — a preventable waste.
What Should You Track as Conversions?
For service businesses (accountants, lawyers, plumbers, agencies):
- Form submissions on your contact or enquiry pages
- Phone calls directly from Google Ads (using Google’s forwarding number feature)
- Live chat initiations (if using a chat tool that integrates with Google Ads)
- Booking completions if you have an online scheduling tool
For e-commerce businesses:
- Purchase completions (including revenue value for ROAS tracking)
- Add-to-cart events (secondary conversion for optimisation signal)
- Checkout initiations
- Account registrations or email signups
How to Set Up Google Ads Conversion Tracking
- In Google Ads, go to Tools > Conversions and click the + button
- Select the conversion source: Website, Phone Calls, App, or Import from Google Analytics
- Configure the conversion: name it descriptively, set the category and value
- Choose how to count conversions: ‘One per click’ for leads, ‘Every’ for e-commerce purchases
- Install the conversion tag: either manually add the code to your website’s thank-you page, or use Google Tag Manager (recommended)
- Verify the tag is firing correctly using the Google Tag Assistant Chrome extension or Tag Manager’s preview mode
- Confirm the conversion is showing as ‘Recording’ status in your Conversions report
Google Analytics 4 vs Google Ads Conversion Tracking
You can set up conversion tracking directly in Google Ads, or import conversion events from Google Analytics 4 into Google Ads. The GA4 import method is preferred for most South African businesses because:
- GA4 tracks the complete user journey — not just the ad click, but all interactions before conversion
- One tracking setup serves multiple channels (Google Ads, organic, social, email) simultaneously
- GA4’s cross-device attribution provides a more complete picture than Google Ads’ last-click attribution
- Importing from GA4 is simpler if you already have GA4 installed correctly
See Google’s conversion tracking setup guide for step-by-step instructions including the code implementation details for different website platforms.
Frequently Asked Questions
What if my website has no thank-you page?
Many contact forms redirect to the same page or show an inline success message rather than loading a separate thank-you URL. In this case, use Google Tag Manager with a trigger that fires on the form submission success event (typically a CSS class added to the confirmation message or a form ID + success state trigger). This approach tracks the conversion without requiring a dedicated thank-you URL.
How do I track phone calls from Google Ads?
Google Ads offers call tracking through Google Forwarding Numbers — a Google-provided phone number that forwards to your real number. Calls through this number are automatically tracked as conversions. Alternatively, use a call tracking platform that integrates with Google Ads (e.g., CallRail, WhichCallRail South Africa equivalents) for more detailed call analytics including call recording and duration tracking.
What is a primary vs secondary conversion?
In Google Ads, you can designate conversions as primary (used by Smart Bidding to optimise) or secondary (tracked for reporting but not used to direct bidding). For example, a form submission would be primary (the main business outcome), while a page view of the services page might be secondary (informative but not a direct business outcome to optimise toward).
How long does it take for conversion data to appear?
Conversion data typically appears in your Google Ads account within 24-48 hours of a conversion occurring. Google applies a conversion window (default is 30 days for clicks) — a click today can generate a conversion anytime within that window and it will still be attributed to the original click. This means conversion data for recent campaigns may still be ‘incoming’ for up to 30 days.
Can I import conversions from my CRM?
Yes — Google Ads allows offline conversion imports. If your sales process involves follow-up after an online lead (common for B2B South African businesses), you can upload a CSV of closed deals back into Google Ads, matched to the original click using GCLID (Google Click ID). This allows Smart Bidding to optimise for actual sales rather than just form fills.