Multiplex is the ads-only successor to Matched Content. Create the unit in AdSense, place its generated code in a controlled template, protect page experience and consent, and verify the ad request without clicking a live ad.
AdSense removed ordinary subdomain management from the Sites page in March 2023. A blog or app beneath an approved domain can still serve ads, but setup, ads.txt, crawler access, privacy, and page quality all need deliberate verification.
Google retired Matched Content’s own-site recommendation service in March 2022 and converted the format to ads-only Multiplex units. Here is what the grid does now—and what to use when the real goal is related articles.