Introduced Limited ad serving for unqualified advertisers in higher-risk scenarios

From November 2023 Google limits impressions for unqualified advertisers when the advertiser-brand relationship is unclear or ads carry no branding; qualified advertisers, judged on user feedback, account maturity, compliance history and verification, serve without limits.

Google's change log gives only the month for this post (August 2023); the entry is dated to the first of that month.