1. On your computer, open Chrome.
2. At the top right, click More Settings.
3. At the bottom, click Advanced.
4. Under "Privacy and security," click Site settings.
5. Click Notifications. 
6. Choose to block or allow notifications:
   • Block all: Turn off Ask before sending.
   • 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.