How to stop recurring Safari notifications on MacBook Pro?

Open Safari, go the Safari Menu ➜ Settings ➜ Websites ➜ Notifications(on the side panel) and make sure no odd websites are allowed there to send notifications.

click here ➜ Customize website notifications in Safari on Mac - Apple Support

Oz10M wrote:

Hi all,

how do I get rid of this annoying notification that keeps popping up every few minutes?

Kindest regards,

Austen

MacBook Pro on Safari

Official Apple Support Community

Recognize and avoid phishing messages, phony support calls

Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support

ref: Block pop-up ads and windows in Safari - Apple Support

Uninstall all third party apps that are Cleaners/Optimizers/Anti-Virus/VPN

these third party apps are known to causes issues on macOS and augment these type of unwanted notifications.