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

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

Follow these instructions: Stop unwanted Notifications - Apple Community

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.

That's a scam message, probably trying to trick you into buying useless and often harmful "protection" apps.

These can happen for a number of reasons but are commonly caused by downloading from not-so-honest download hosting sites. Suspicious content includes:

— software offered "free" that you well know sells at a price from legit sites

— fonts

— screensavers

— ringtones

— hard to get instruction/assembly manuals

to mention a few.

Bottom line: No one, not even Apple, can "see" or "detect" what is on your computer unless you specifically give them remote access. Follow the instructions others have provided.