This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
It’s not just that.
Apples implementation of this doesn’t tell the website anything about the device other than “Apples approves”.
Google’s implementation will give the website direct information about the browser and computer. Which permits them to get granular and targeted on restrictions.
Its a fixed identifier, it can be a replacement for amythimg to forcably identify users:
This reminds me: If you want to see what happens when a company implements this system where they approve your usage and then warps it into a punishment system later by revoking their approval when youve been naughty, see minecraft chat reporting.