Allow or block notifications from all sites
On your computer, open Chrome.
At the top right, click More and then Settings.
Under 'Privacy and security', click Site settings.
Click Notifications.
Choose to block or allow notifications:
Allow or Block all: Turn on or off Sites can ask to send notifications.
Block a site: Next to 'Block', click Add. Enter the site and click Add.
Allow a site: Next to 'Allow', click Add. Enter the site and click Add.