There is a setting in Meta Business Manager that takes about ten minutes to complete, costs nothing, and most businesses running ads have never touched it.
If your domain isn't verified, Meta is under-reporting your results, your conversion tracking is running at a fraction of its capability, and in 2026 you may be one review away from losing access to your ad account altogether.
Here's what's actually going on, and why it matters more now than it ever has.
Verifying a domain is simply proving to Meta that you own the website you're advertising. You do it in Business Settings, under Brand Safety → Domains, using one of three methods:
Any of the three works. DNS is the most durable because it survives website rebuilds, theme changes and developer handovers — the other two have a habit of quietly disappearing when someone redesigns the site.
That's the mechanic. The interesting part is why Meta started insisting on it.
In April 2021, Apple released iOS 14.5 with App Tracking Transparency. Every iPhone user started seeing a prompt asking whether an app could track them across other companies' apps and websites. The overwhelming majority said no.
For Meta, whose entire advertising model depended on following users across the web, this was an earthquake. Overnight, a large share of conversions simply stopped being visible.
Meta's answer was Aggregated Event Measurement — a system that reports conversions in a limited, privacy-preserving way rather than tracking individuals. And it came with a hard constraint: you can configure a maximum of eight conversion events per domain, ranked in priority order.
Here's the part that catches people out. You cannot configure those eight events unless the domain is verified.
That was the moment domain verification stopped being an optional housekeeping task and became the gate through which all iOS conversion tracking passes.
Meta has been steadily tightening business verification. Domain verification now sits inside a broader set of checks covering legal entity, contact details, domain ownership and tax status.
The triggers for a mandatory review vary, but advertisers using the Conversions API, sharing pixels across accounts, operating in restricted categories, or passing certain spend thresholds are the most likely to be asked. Failure to complete the process can mean restrictions on the ad account — or suspension.
The practical takeaway is unchanged: this is a ten-minute job that protects everything else you've built. It is a bad thing to be doing for the first time under a deadline, with campaigns paused.
If you have more than one domain — a main site, a landing page domain, a booking subdomain — each needs verifying separately. This is the step most often missed, and it's usually the landing page domain, which is precisely where the conversions happen.
Domain verification doesn't win you customers. It won't improve your creative, sharpen your targeting or lower your cost per lead on its own.
What it does is make sure that the results you're already getting are actually being counted. And you cannot optimise what you cannot measure.
If you're spending money on Meta and haven't verified your domain, you're not just running with one eye closed. You're making decisions — pausing campaigns, cutting budgets, dropping creative — based on numbers you know to be wrong.
Need a hand with this, or want us to audit what your tracking is currently telling you? Get in touch.