The Sheppared.club pop-ups are a browser-based tactic that aims to persuade users to subscribe to browser notifications from an unsafe website. People usually get redirected to the Sheppared.club page either by other similar pages or a browser hijacker that has infected their systems and replaced their homepages with a fake search engine.
When the users visit the website, they see the following pop-up message:
'Sheppared.club wants to Show notifications
Click Allow to confirm that you are not a robot!'
Though it looks like a legit test to confirm that the user is not a robot, the "Allow" button should never be clicked; instead, leave that page immediately! If you agree to receive notifications from Sheppared.club, this website will start sending you advertisements with potentially harmful content that may redirect you to online gambling websites, adult pages, fake software updates and Possibly Unwanted Programs (PUPs). Pages of that kind could install malware on your computer easily, causing you substantial monetary losses.
Sheppared.club's advertisements also can be related to an adware program. If you see such unwanted notifications, we recommend scanning your device with a reputable malware-detection program.