A better alternative to the Do Not Track header for website visitors are browser extensions such as adblockers. However, there are also legally binding regulations for website operators so that they are not simply allowed to track everything and everyone at will. According to the GDPR, the setting of non-essential cookies and the processing of personal data may generally only take place after the user has given active and informed consent - also known as the opt-in procedure. The easiest way to implement this is with the help of a cookie banner.