How can I distable coub.com weekly notifications

Every week I receive a Mac notification about Coub.com weekly. If I click into it it will take me here on Safari browser. I was trying to disable it by changing the preferences -> notifications -> Safari. But it didn't help. Any ideas?

Assuming the notification is really coming from the coub.com website, you would disable that in Safari preferences, not System Preferences.

Go to the Safari Preferences > Websites tab, select Notifications on the left, and you'll see a list of all the websites that have asked you for permission to send notifications. From there, you can change the notification preference for coub.com to "Deny".