That’s technically required by the GDPR - any data controller must give you all the data they hold about you upon request and be able to review or explain any a

That’s technically required by the GDPR - any data controller must give you all the data they hold about you upon request and be able to review or explain any automated decision. This would include ad targeting data. The problem is that the GDPR isn’t enforced enough even at a very basic level, let alone technicalities like this.