Captcha4greatpeaple.top is a bogus website created for the purpose of generating revenue from pay-per-click advertising. It uses social engineering methods to trick people into clicking the “Allow” button. By doing this, people turn on push notifications, which means they start getting spammed with annoying pop-up ads.
The creators of the site do not particularly care about user privacy or security so they may use rogue advertising networks that display ads leading to dangerous websites. Users can get tricked into providing personal information, downloading PUPs (potentially unwanted programs), and even malware.