Google has extended its Limited Ad Serving policy from Google Search to every Google Ads surface. The company published a change log entry titled "Update to Limited Ad Serving Policy (August 2026)" on 5 August 2026, widening a policy that a June 2026 update had scoped to Search alone. The mechanism is not ad disapproval. Google instead limits the number of impressions an advertiser can serve in certain ad-serving scenarios when it judges that advertiser unqualified. The rollout begins in August 2026 and will be implemented gradually through 2028.
What the Limited Ad Serving policy does
Under the policy Google does not disapprove the ad, so there is no rejected asset to find and fix. What changes is delivery volume. Google assesses whether an advertiser is qualified using a range of account signals: account maturity, advertiser verification status, policy compliance history, user activity and reports, ad format usage, the advertiser's industry, and other account attributes. Advertisers Google judges to have strong trust signals are not subject to impression limits at all.
That is the part worth sitting with. A campaign can be technically perfect, fully approved, correctly bid and still underdeliver because the account behind it has not accumulated enough trust. The lever is the account, not the ad. Anyone running Google Ads campaigns from a recently opened account is now looking at a delivery ceiling that no bid adjustment will lift.
How an advertiser finds out they have been limited
Accounts that get limited receive an in-account notification. Google's own policy page states this happens when an advertiser has "a meaningful proportion of impressions in scope of this policy", which means small amounts of limited traffic may pass without a warning appearing. Advertisers can appeal through Google's Limited Ad Serving Appeals Form.
On timing, Google's policy page offers no commitment: "We will automatically review and update advertisers' ad serving limits as we continue to monitor your accounts. Unfortunately, we can't say how long this might take." Search Engine Land covered the August update in its report on the change, which you can read at Search Engine Land.
Google published two separate sets of best practices
The August 2026 document splits its guidance in two. For Google Search campaigns, Google advises advertisers to avoid generic ad copy, clearly identify the business, and pin the domain to the first headline. For YouTube, Gmail, Discover and the Play Store, the guidance is broader: build campaigns that generate positive user engagement.
The Search advice is unusually concrete for a policy document. Pinning the domain to headline one is a structural change to how many accounts write responsive search ads, and it trades some asset rotation for a clearer signal of who is advertising. The engagement guidance for video and feed placements is vaguer, which matters more for teams running YouTube advertising, since Google's standing Limited ad serving policy page notes that initial enforcement began in September 2024 and would gradually be applied to all YouTube ads by 2026.
The August 2026 update at a glance
The table below sets out what Google stated in the change log entry and its standing policy page, with no added interpretation.
| Element | What Google states |
|---|---|
| Scope before August 2026 | Google Search only, per the June 2026 update |
| Scope after 5 August 2026 | All of Google Ads |
| Enforcement method | Impression limits in certain ad-serving scenarios, not ad disapproval |
| Rollout window | Begins August 2026, implemented gradually through 2028 |
| Advertiser recourse | In-account notification plus the Limited Ad Serving Appeals Form |
What this means for Thai marketers
The source does not discuss Thailand or any country-level rollout order, so nothing below is a claim about the Thai market. It is a reading of the policy as written.
The account profile the policy describes is common in Thai digital marketing: a new company opens a Google Ads account, skips advertiser verification because ads are running fine without it, and scales spend within weeks. Under a delivery throttle tied to account maturity and verification status, that sequence now carries a cost that will not show up as an error message.
- Complete advertiser verification before scaling spend, not after impressions start falling short.
- Keep the business name consistent across the ad, the display URL and the landing page, which is what Google's "clearly identify the business" guidance asks for.
- Treat unexplained impression shortfalls in a young account as a possible policy limit rather than only a bid or budget problem.
- For agencies onboarding new clients, verification status belongs on the account handover checklist alongside conversion tracking.
FAQ
Will my ads be disapproved under this policy?
No. Google does not disapprove ads under Limited Ad Serving. It limits the number of impressions an advertiser can serve in certain ad-serving scenarios, so the ads stay approved while delivery falls short.
How do I know if my account has been limited?
Limited accounts get an in-account notification. Google's policy page says this happens when an advertiser has "a meaningful proportion of impressions in scope of this policy", so a smaller amount of affected traffic may not trigger a visible alert.
Is this live in Thailand?
The source does not say. Google described the policy as covering all Google Ads with a rollout beginning in August 2026 and running through 2028, but published no country-by-country schedule.
Do I have to do anything right now?
Nothing is required, but two of Google's stated best practices are cheap to act on: complete advertiser verification, and make sure ad copy identifies the business rather than reading as generic. Google also advises pinning the domain to the first headline in Search campaigns.
Can a limited account be un-limited?
Yes, through Google's Limited Ad Serving Appeals Form, and Google says it also reviews limits automatically as it monitors accounts. It gives no timeframe for either route.
Where to take this next
A delivery policy that runs on account trust rather than ad content rewards accounts that were set up properly and punishes the ones assembled in a hurry. If your impressions have flattened without an obvious bid, budget or auction explanation, an account-level review of verification, branding consistency and policy history is the place to start.
