Does Google use Android mobile numbers for ad-tracking purposes? When does it ask for consent?

> ### Turn "Better ads & Google services" on or off > > This setting lets your phone number to be used across Google services to show you ads more relevant to you. If you don’t want personalized ads, turn off the setting ... > > \- [Google Account Help](https://support.google.com/accounts/answer/3463280?hl=en&co=GENIE.Platform%3DAndroid&oco=1#zippy=%2Cturn-better-ads-google-services-on-or-off) Google created this phone number setting to make money. It must get turned on some other way, that doesn't involve you digging into Google settings. I want to find how this happens. When I use a computer to add a phone number to Gmail / Google account, it leaves this ad-tracking turned off. Do Android phones ask you to turn on this "Better ads" setting?