When Google first introduced Limited Ad Serving in 2019, it was a quiet mechanism for restricting new or unverified advertisers on Search. Most established accounts ignored it entirely. If your ads weren't getting disapproved, you were fine.
That logic no longer holds. Google published a policy change log entry on August 5, 2026 announcing that Limited Ad Serving now covers every Google Ads surface — including YouTube, Gmail, Play Store, and Discover — with full implementation rolling out gradually through 2028.
The mechanism is the same. The surface area is not.
What "limited" actually means
Limited Ad Serving doesn't disapprove ads. It caps impression volume. Your ad can carry a status of "Approved" in Google Ads while receiving a fraction of the impressions it would otherwise be eligible for.
The two things look completely different inside your account. Disapprovals show up in the Policy Manager. Limited Ad Serving doesn't. If you're watching for policy strikes and thinking you're clean, you may be missing the whole story.
The only signal Google provides is an in-account notification when a "meaningful proportion" of your impressions are in scope. That threshold is undefined. Individual ads are never flagged.
What this means practically: you can have an approved YouTube campaign that's delivering at a fraction of its eligible scale and never receive any alert telling you why.
What determines whether you're qualified
Google evaluates several factors when deciding whether an account can serve at unrestricted scale. Per Google's updated policy documentation, these include:
- Account maturity
- Advertiser verification status
- Policy compliance history
- User reports about your ads
- Ad format usage patterns
- Industry category
None of this is a binary test, and Google doesn't publish a score. The clear practical read is that accounts with unverified identities, recent policy warnings, low account age, or industries Google treats with extra scrutiny face higher risk. Financial products, legal services, and supplements are the obvious categories, but the framework applies broadly.
Why this matters more on YouTube and Gmail than on Search
The Search version of this policy had a tell: impression share. You could pull Search Impression Share over time and see if something dropped without obvious cause.
YouTube and Gmail don't offer the same baseline. CPM looks normal on a Video campaign, reach is ambiguous, and Gmail never had great native reporting. If you're seeing lower-than-expected delivery, the potential explanations include creative performance, audience overlap, publisher supply constraints, or now, impression throttling.
That diagnostic ambiguity is the actual risk. You likely won't confidently identify LAS throttling through normal account review. You'd have to be specifically looking for it and comparing delivery trends across surfaces against budget and bid constraints.
For brands running serious YouTube budgets — whether that's bumpers, demand gen, or Shorts — this introduces a delivery assumption that deserves direct verification.
The 2028 timeline and what it means for your account
Google says implementation completes by 2028. This matters for two reasons.
First, not every account is affected today. The rollout is gradual, and established accounts with strong compliance histories are likely not throttled right now. But the policy structure is in place, and the surfaces in scope will expand before the process is done.
Second, the definition of "qualified" may not be static. As more surfaces come in scope, what Google considers sufficient trust signals could shift. An account that passes today might face a different bar in 2027.
Two things you can control right now
Advertiser verification is the fastest lever if you haven't completed it. Google's own policy documentation names verification status as a direct qualification input. The process takes about 10 minutes and documents your business identity against your ad account. If your account is unverified, this is the first thing to fix.
Policy compliance history is harder to change overnight, but it's worth auditing. Outstanding policy warnings — even ones that didn't result in suspension — may factor into how Google reads your account's trust signals. Review your Policy Manager for any active flags and work through them.
Beyond those two, the monitoring response is straightforward: pull impression trends on your YouTube, Discover, and Gmail campaigns over the next 60 days. If you see consistent underdelivery that doesn't correlate with budget limits or bid constraints, LAS throttling is a reasonable hypothesis. At that point, the path is through Google Ads support rather than a self-serve fix.
If you want to see your account's verification status, compliance flags, and delivery patterns across surfaces in one place, the free audit at Gromerce surfaces those signals in under three minutes.
Approved and actually serving are now two different questions. They didn't use to be.
Sources: Search Engine Land, Search Engine Journal, Google Ads Policy Help Center, August 2026
