To stop Chrome notifications for Android devices, follow the steps detailed in this guide.
On the Android device, launch the Chrome application.
To the right of your address bar click on further > Settings.
Select site settings > notifications.
At the top of your screen, switch the settings off or on. If you prefer more peaceful notification prompts, click to switch to quieter notifications. You won't receive the notification in the event that you don't accept numerous notifications from a website or if the user doesn't wish to receive notifications from a site.