Can I talk to companies about their use of my data?

Absolutely! The GDPR requires that companies and organisations respond to questions about personal data. This includes whether or not they process your personal data in the first place, and if so for what purpose, how long it will be stored, and with whom it is shared. And if you ever change your mind about what you have consented to or accepted, companies and organisations are also required not only to make it easy for you to communicate this choice, but also to act upon it.