https://arstechnica.com/tech-policy/2019/08/why-some-experts-are-skeptical-of-googles-new-web-privacy-strategy/

Google's Chrome team is feeling pressure from competitors over ad tracking. Apple has long offered industry-leading protection against tracking cookies, while Mozilla recently announced that Firefox will begin blocking tracking cookies by default. Microsoft has been experimenting with tracking protection features in Edge, too.

But Google has a problem: it makes most of its money selling ads. Adopting the same aggressive cookie blocking techniques as its rivals could prevent Google's customers from targeting ads—potentially hurting Google's bottom line.