A click-through conversion is a purchase, lead or other tracked action that Meta credits to an ad because the person clicked the ad and then converted within a set period, called the click attribution window. If someone clicks your ad on Monday and books on Thursday, and your window is seven days, Meta counts that booking as a click-through conversion.
How click-through conversions work
Every Meta ad set has an attribution setting. The default for most conversion campaigns is 7-day click, 1-day view: Meta credits conversions that happen within seven days of a click, or within one day of someone seeing the ad without clicking. You can also choose a 1-day click window, which is stricter.
The click is recorded when the person taps the ad. The conversion is recorded later, through the Meta Pixel or the Conversions API, and Meta joins the two by recognising the same person, usually through their logged-in Facebook or Instagram account. Ads Manager can split results by attribution type using the “Compare attribution settings” option, so you can see click-through conversions apart from view-through conversions.
Which interactions count as a “click” for this purpose has changed over the years, so read the description beside the attribution setting in your own Ads Manager rather than relying on an older explanation.
Why it matters for a UK business
Click-through conversions are usually the most defensible part of what Meta reports. A person who clicked an ad and then bought within a week has a clear, traceable path. View-through conversions are harder to argue for, because the person may have bought anyway. Splitting the two shows how much of Meta’s reported success rests on the stronger evidence.
It also explains why your numbers disagree with GA4. GA4 typically credits the last channel the visitor arrived through, and it can only see visits from people who accepted analytics cookies. Meta credits its own ad if it was clicked within the window, even if the person later came back through Google. Neither is wrong; they answer different questions, and UK consent rules mean both see only part of the picture.
Common mistakes
- Adding Meta’s reported conversions to Google Ads’ reported conversions and treating the total as real sales. Both may claim the same order.
- Switching attribution settings mid-campaign and comparing the new figures with the old.
- Reporting all conversions without showing how many came from clicks.
- Assuming a click-through conversion means the ad caused the sale. It shows the ad was clicked first, not that the sale would not have happened anyway.
- Setting a seven-day window for an impulse product where nearly every real purchase happens the same day, which lets weak ads take credit for later, unrelated orders.
How to act on it
Use the attribution comparison in Ads Manager and add click-through and view-through columns to your standard report. If most of a campaign’s results are view-through, treat its reported return with caution and look for other evidence, such as a rise in branded searches or direct orders while it runs.
Pick the attribution window that suits your buying cycle and keep it fixed so trends stay comparable. Check results against your own sales records each month. For a firmer answer on whether ads cause sales, a lift test or a planned pause in one region gives evidence that attribution alone cannot, a point covered under incremental attribution. Setting this reporting up properly is part of my Facebook ads management.