Agagaure.com is a malicious site indeed. It attacks Google Chrome and may also affect other browsers. It tries to make you click on the "Allow" button to make you subscribed to many annoying ads shown as web push notifications. Do not ever interact with such pop-ups. Remove them with Combo Cleaner Antivirus via the official page - https://www.combocleaner.com or, optionally, follow the manual suggestions set forth in the video.