The website allow2continue.com will try to trick you into hitting “ALLOW” for validation but it actually will register the user to its push notifications so it can then spam unwanted advertisements to your desktop. These ads are for browser extension downloads, online gaming, giveaway scams, adult sites, fake software updates and the likes. Clicking the ads will send you to malicious websites to get money from you or infect your computer further. It may also prevent you from changing your settings back.
Allow2continue.com is usually installed through bundled software without you knowing. It has to be removed immediately.