looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
and also some github docs
So here's the thing. This web integrity nonsense isn't about locking people into Chrome, it's about locking people into seeing what they'd see if they were using Chrome. The result might be more people using chrome if a website decides to DRM their content and their ads, but if you switch from one Chromium-based browser that forces you to see the ads like Chrome does to another Chromium-based browser that forces you to see the content that the website originator wants you to, like Opera, that's still a win for Google who are more interested in forcing you to see ads for this cause than for you to use Chrome.
The solution is voice objections to Google implementing this, to not use websites that implement DRM, and to not use web browsers that let Google dictate what the future of the web through their control of the Chromium engine