How Meta's attribution changes redefine a click, a view and a reported conversion

In Meta's reporting, attribution depends on two things: what counts as a click or interaction, and how long after it a conversion can still be credited to the ad.

Both definitions changed within about six months. In October 2025 Meta announced cuts to the windows available through its Ads Insights API, which took effect on January 12, 2026. On March 3, 2026, it announced a new definition of a click.

Together the changes alter what a Meta conversion column means, and why a number from last year may not match one from this quarter.

What click-through attribution counts now

Meta published the change on March 3, 2026, in a post titled "Simplifying Ad Measurement for a Social-First World." For campaigns optimizing for website or physical-store conversions, click-through attribution now covers link clicks only. Those are clicks that send a person to the advertiser's destination.

Before the change, Meta's documentation said clicks could include interactions such as likes, shares and saves, according to PPC Land. Conversions that followed those interactions could be credited under click-through.

PPC Land gives an example. A user who likes an ad on Monday and buys on Thursday no longer appears in click-through conversions. Only a link click would count.

Meta states the aim as bringing its reports closer to third-party tools such as Google Analytics. PPC Land describes the mismatch as coming from engagement actions that never sent users to a website, so those conversions had no matching Google Analytics session.

Where shares, saves and likes went

Conversions that follow non-link actions are now reported under engage-through attribution. This is the former engaged-view attribution, renamed. PPC Land reports that the category keeps video views and now also includes shares, saves, likes and other social actions.

Meta recommends using engage-through alongside click-through data. Engaged-view attribution launched in February 2024 and, per PPC Land, counted conversions within 24 hours of a video view of at least 10 seconds.

The effect on a report is a reclassification. A conversion that once appeared under click-through after a save can now appear under engage-through. PPC Land says advertisers may see a visible drop in reported click-through conversions as the change takes effect.

Two advertisers quoted by Meta welcomed the split. Riyad Ebrahim, co-founder and CEO of the apparel brand JAKI, said it can help determine which campaigns are more effective at driving results from social interactions than from link clicks. Vinee McCracken, social director at Mpix, said it gives more granularity in reading Meta's impact.

Why the 5-second video threshold matters

The same announcement lowers the length of an engaged view on video ads from 10 seconds to 5 seconds. Meta says the shorter threshold gives a more accurate signal for optimization.

Meta supports it with its own figure: 46% of online purchase conversions with Reels happen within the first 2 seconds of attention on its video ads.

PPC Land reports that the 5-second threshold could increase the conversion volume attributed through engage-through.

PPC Land also notes that Meta's bidding uses reported conversions as training signals. Cost per result and conversion volume may therefore shift after the update. Its advice is to monitor those metrics because the measurement definition has changed, even if performance has not necessarily.

Which windows left the API in January 2026

A separate change hit reporting pipelines rather than Ads Manager screens. Meta announced on October 13, 2025, that it would remove two view-through windows from the Ads Insights API: 7-day view (7d_view) and 28-day view (28d_view). Chris Cutlip published the details on Meta's Developer Blog on October 16, 2025, and the removal took effect on January 12, 2026, across all API versions.

PPC Land, summarising the developer post, reports that the 1-day click, 7-day click, 28-day click, 1-day engaged view and 1-day view windows remain available. Those work with default values based on each advertiser's attribution settings.

Queries using the removed windows return empty data rather than error messages. A dashboard built on those windows can fail silently.

Meta's stated reasons, as PPC Land quotes them, are to "reduce discrepancies with Meta Ads Manager" and to improve API performance. PPC Land reports that the use_unified_attribution_setting and action_report_time parameters will be disregarded, and that the notice period for the main changes was about 90 days.

A month that straddles the staged rollout holds two definitions of a click.

New limits on how far back some data reaches

The October 2025 announcement also set retention limits for certain breakdowns. According to PPC Land, unique-count fields and hourly breakdowns are limited to 13 months. Frequency breakdowns are limited to 6 months. Total values for API fields remain available for up to 37 months, matching Ads Manager.

A query that starts before those limits returns empty results for the affected fields, per the same report. Year-over-year comparisons of unique metrics, hourly performance or frequency therefore run only as far back as the limit allows.

PPC Land adds that Meta's stated rationale is performance, and that queries on data older than 13 months are pushed toward asynchronous jobs.

Marketing mix model breakdowns also changed. They no longer work in synchronous requests and need asynchronous jobs: submit a job, poll for completion, then retrieve results. The change applies to eight endpoints, covering GET and POST requests at the ad account, campaign, ad set and ad levels.

What to check in an account first

PPC Land reports that billing is unchanged by the March definitions. The changes affect how conversions are credited in reports, not what advertisers are charged.

The first check is the date of any comparison. PPC Land reports that the change begins rolling out later in March 2026, with timing varying across accounts. A month that straddles the staged rollout holds two definitions of a click.

The second is any external dashboard, spreadsheet or data warehouse that pulls from the Insights API. Any query that requests 7d_view or 28d_view needs to be rewritten, and any pull that reaches back beyond 13 months, or any frequency breakdown older than 6 months, needs to be checked for empty fields.

The third is third-party tooling. Meta says it is beginning to partner with Northbeam and Triple Whale so that their attribution models include both clicks and views.

The fourth is the measurement method itself. Meta describes incrementality experiments such as Conversion Lift as the gold standard for measurement, and says fully adopting that approach can take time. Attribution columns show which ad was credited. A lift test measures what the ad caused.