Cookies are powerful tools that can be used to track a lot of information about users. Considering the privacy risks, many countries and regions have created laws that set compliance guidelines for website owners.
For instance, European Union has the GDPR and ePrivacy Directive. Similarly, countries like Canada, UK, Japan, and many more have laws that require website owners to get user consent and disclose the information they collect, store, and track about users.
That’s the reason why you see cookie popups on many different websites. These banners allow website owners to comply with GDPR, cookie laws, and other privacy laws in different countries.