New Conversion Tracking Mechanism in Meta Pixel

CPARIP 5 November 2026 2 min

Starting November 12, Meta will begin tracking website purchases differently. Events Manager now includes the Measure conversions on customer devices setting, which is already enabled by default for eligible pixels.

Here is how it works: say someone sees an ad on Facebook or Instagram but makes a purchase later. Currently, Meta cannot always link that purchase to the ad. The new feature will make it possible to do this directly on the customer’s device.

It uses data the buyer has already provided on the website, such as an email address, along with temporary device data that cannot identify them personally. According to Meta, this data remains on the device during matching. The company receives only purchase confirmation and information about which ad campaign should receive credit for it.

However, there are limitations: the website must require account login via email or phone number, and the pixel must be installed directly on the page, without an iframe or img tag. The feature will not work for users in the EU and the UK.

At the same time, attribution settings will not change. Meta Pixel and Conversions API will also continue to work as before.

As a result, Ads Manager may show more tracked purchases, even if actual sales do not increase. This may lower the reported cost per purchase because Meta will begin counting some conversions it previously could not link to ads.

You can find the setting in Events Manager > Data sources > select a pixel > Settings > Meta Pixel settings > Measure conversions on customer devices. You can disable it if necessary.

For now, Meta describes how the feature works using purchases as an example. Its documentation does not specify whether it will also track leads and other events.