Safari Notifications that I am being hacked

Good morning, I was browsing the internet the something did a google search and clicked on one of the links.

got a notification that my computer and iCloud have been hacked. I just x'd out of the page and continued about my day, since then I keep getting safari notifications that say they are from Norton anti virus (which I dont have) and they say I've been hacked. I downloaded Malwarebytes and scanned the computer, it did not pick up anything. Should I do anything else to check this, or can I stop these notifications. Is this something I need to worry about?