Certain financial services providers will have to prove they are authorised by the financial regulator before advertising on Google from today (6 September). It's an effort by the search engine to tackle online fraud, but the new policy doesn't apply to ads for cryptocurrency or debt services and there are some other exclusions.

https://www.moneysavingexpert.com/news/2021/09/google-scams-update-comes-into-force/