I logged into Google today and they forced me to provide a date of birth. They then prompted to confirm my age.
They claim they need this to comply with the law.
They also say it is used for their dossier for “ad purposes”. Supposedly the use of this for ad purposes can be turned off.
Presumably one can also lie and give a fake date – although I assume that at some future date they will prompt you to enter your age again to confirm account access. Thus, you’d need to keep a log of what date you provide to Google.
Unfortunately, we cannot trust Google with any personal information.