OpenCart cookiefy module is another free module from webocreation.com where it will show the cookie when the site loads for the first time. As the EU Cookie law states, that site owners have to inform visitors about their usage of cookies. It was created to save and protect the privacy of site visitors. I have tested this module only for 2.3.0.2.

More detail at:
https://webocreation.com/blog/cookiefy-opencart-store-free-module-version-2-3-0-2