Alondondon.xyz is an online tactic that makes users subscribe to push notifications from its unsafe website. Then, Alondondon.xyz displays pop-up messages with advertising content to users' PCs or mobile phones directly. When you visit Alondondon.xyz page, you will see the following message:
"Alondondon.xyz wants to Show notifications
Click Allow to confirm that you are not a robot!"
The purpose of this message is to trick you into clicking on the "Allow" button, which will mean that you permit this website to deliver browser notifications to your screen directly, regardless of whether your browser is launched or not. The advertisements from Alondondon.xyz can be very annoying and unsafe, as they advertise fake/cracked software, various PUPs, websites with adult content or dubious online games.
If you notice additional symptoms, like an unsolicited change of your browser's homepage or default search engine, you probably also have an adware program installed on your computer. Malware experts recommend removing such threats immediately, as they usually lead to serious security and privacy issues.