"As of 23 March 2026, the Google Ads Gambling and games policy will introduce additional certification eligibility requirements," the email states. "Applicants for gambling certifications must now demonstrate good policy health to advertise in any gambling and games category." Specifically, advertising certification will not be granted if the site is hosted on a free platform, if it uses a subdomain of a third-party platform, if the advertiser doesn't own and operate the second-level domain, and/or if the site has no real association with gambling.