In the past, most spam was distributed using emails, however, email providers have become efficient in dealing with the problem and so this method is consequently less effective. In some cases, these pop-ups occur after clicking intrusive advertisements displayed by malicious sites. Research shows that users typically encounter 'Allow Website Notifications' when they have potentially unwanted adware-type programs (PUPs) installed on their computers. It is a simple method used to promote various malicious sites. 'Allow Website Notifications' is a spam promotion method that has recently become popular amongst cyber criminals. Allow Website Notifications removal instructions What is Allow Website Notifications?