What Is Getcaptcha21.com?
Getcaptcha21.com is one of many dubious sites that attempt to trick users into allowing those sites to send notifications to users’ computers or smartphones. Getcaptcha21.com claims that users need to click Allow on its “Show notifications” pop-up in order to prove that users are humans and not bots, confirm that they are 18+, etc. If a user does click Allow, he or she will start seeing Getcaptcha21.com notifications on the right side of the screen from time to time. The notifications will spam the user with ads, scammy messages, software offers, links to untrustworthy websites, and so on.