
It is perfectly private
It's all between you and Google. No one else will ever know anything about it.
Well, no one but Google and the 13 million companies to which it sells its data . . .
Google's Privacy Sandbox, which aspires to provide privacy-preserving ad targeting and analytics, still isn't sufficiently private. According to a draft report from the UK's Information Commissioner's Office (ICO), obtained by the Wall Street Journal, the technology leaves gaps that can be exploited to deny privacy and track …
Bluntly any corporation like Google that has a fundamental business model of collecting and monetarising user's data cannot be trusted.
The sad facts are that 99% of users do not care and just accept any cookies, legitimate interest the lot.
The latter really annoys me as the default is enabled but is blank unless "Object" or "Withdraw consent" so it is even less clear that you are accepting hundreds of dubious cookies with very long lifetimes that are doing nothing more than scraping data to then make money.