What exactly is changing

Meta's attribution model decides which interaction gets credit for a conversion, and from March 2026 it redrew the lines between its two core categories: click-through and engage-through attribution.

  • Click-through attribution used to credit a conversion to an ad if someone clicked anywhere on it, including taps that weren't really "clicks" in the way advertisers think of them. That's now narrowed to link clicks specifically, the tap that actually takes someone to your website or app.
  • Engage-through attribution used to be a narrower bucket. It's now been renamed and expanded to explicitly include likes, comments, shares, saves and video engagement, on top of the on-platform interactions it already covered.
  • The video engagement window that counts toward engage-through attribution was shortened from 10 seconds of viewing down to 5.

None of this is a new tracking method or a new pixel requirement. It's a reclassification of which interaction type a conversion gets filed under in Ads Manager, which is exactly why it's easy to miss until your reporting looks different.

Before vs after, side by side

Before March 2026
  • Click-through credited broader ad interactions, not just link clicks
  • Engage-through was a narrower, less-used category
  • Video engagement window: 10 seconds of viewing
From March 2026
  • Click-through means link clicks only
  • Engage-through covers likes, comments, shares, saves and video engagement
  • Video engagement window: 5 seconds of viewing

Why your numbers moved even though nothing else did

Because engage-through now captures more interaction types and a shorter video window, some conversions that used to land in click-through now land in engage-through instead, or count sooner than they used to. Total conversions on a well-tagged account shouldn't disappear, but the split between "click" and "engagement" driven results can shift noticeably, especially on video-heavy or awareness-leaning campaigns where engagement was always doing more of the work than the click numbers suggested.

If you report channel performance by attribution type, or compare Meta's numbers against another platform's click-based reporting, this is the change most likely to make a like-for-like comparison stop looking like one.

Does this affect billing or targeting

No. This is a reporting and attribution change, not a change to how campaigns are billed, optimised or delivered. You're not paying differently and your ads aren't being shown to different people because of this. The only thing that moved is which bucket a given conversion gets counted under in your results.

What we'd check on your account

On our own client accounts, this is what we've been doing since the rollout:

  • Re-baseline before/after comparisons around March 2026 rather than trending click-through numbers straight across the change, since the category itself narrowed.
  • Separate video-heavy campaigns out when reviewing performance, since these are the most likely to show a shift purely from the shorter engagement window.
  • Cross-check total conversions, not just click-through conversions, when reporting results to a client or stakeholder who's used to seeing one number move.
  • Flag the change explicitly in any reporting that compares Meta against a platform that still attributes on broader click definitions, so a shift in split doesn't get mistaken for a shift in performance.

Worth knowing: if a conversion count moved on an account you haven't touched since February, this reclassification is the first thing worth ruling out before assuming something broke.

FAQ

No. This changes which category a conversion is filed under, click-through vs engage-through, not whether it happened. Total conversions on a properly tagged account should stay consistent; the split between categories is what moves.

No action is required on tracking. This is a change to Meta's internal attribution categorisation, not to how conversions are captured or sent.

It depends how your campaign was already performing. Video and engagement-led campaigns are more likely to see conversions shift into engage-through and appear sooner, which can change how cost per result reads by category, even though total spend and total results are unaffected.

The attribution categories apply account-wide, but the practical impact is largest on campaigns where engagement and video views were already a meaningful share of activity, awareness and video view campaigns in particular, rather than pure link-click conversion campaigns.