Conversion Tracking

Conversion tracking is the process of recording when a visitor completes a valuable action on your website, such as buying a product, submitting an enquiry or calling your business. It connects traffic to business results, so you can see which pages and channels actually generate leads and sales.

Written by Paul Hoda, SEO consultant since 2005. Last updated 8 November 2026.

What counts as a conversion?

A conversion is any action that matters to your business. It helps to separate them into two groups:

  • Macro conversions: the main goals, such as purchases, quote requests, bookings and phone calls.
  • Micro conversions: smaller steps that suggest interest, such as newsletter sign-ups, brochure downloads, adding to basket or clicking a phone number.

In Google Analytics 4, actions you mark as important are called key events. Google renamed GA4 conversions to key events in 2024, while the term conversion is still used in Google Ads.

Why it matters for SEO

Traffic and rankings are only useful if they lead to results. Conversion tracking lets you:

  • See which landing pages turn organic traffic into leads or sales.
  • Prioritise transactional keywords and pages that drive revenue.
  • Calculate SEO ROI by comparing the value of conversions with what you spend.
  • Spot pages with plenty of visits but few conversions, which may need better content or calls to action.

How to set it up

  1. List the actions that matter most and give each one a value where possible.
  2. Decide how each action can be detected: a thank-you page, a button click, a form submission event or an ecommerce purchase event.
  3. Use Google Tag Manager or your platform’s built-in integration to send these events to GA4.
  4. Mark the relevant events as key events in GA4.
  5. Test each one by completing the action yourself and checking the real-time or DebugView reports.
  6. Review conversions by channel and landing page in your regular SEO reporting.

Tracking offline and phone conversions

Many businesses close deals by phone or in person. Track clicks on phone numbers, use call tracking numbers where appropriate and, if you use a CRM, record the lead source so offline sales can be linked back to organic search.

Even a simple question on your enquiry form, such as how did you hear about us, gives a useful cross-check. Answers will not be perfect, but they often reveal that people found you through search before calling or visiting.

Common mistakes

  • Counting the same conversion twice, for example when a thank-you page is refreshed.
  • Tracking only purchases and ignoring enquiries and calls.
  • Marking too many minor events as key events, which inflates figures.
  • Forgetting that consent choices mean some visits will not be recorded, so totals are often lower than reality.
  • Judging SEO on last-click conversions alone. Organic visits often start the journey even when another channel closes it.

Key Takeaways

  • Conversion tracking records valuable actions such as sales, enquiries and calls.
  • GA4 calls important actions key events; Google Ads still calls them conversions.
  • It shows which organic landing pages generate real business results.
  • Test every conversion before relying on the data.
  • Track both macro and micro conversions, including phone calls.

Related Terms

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