The below video shows how to get rid of Google Chrome’s desktop notifications:
1. Open Google Chrome and click the settings menu (three bars) in the upper right corner. Choose Settings from the drop-down menu.
2. At the bottom of the screen, click Show advanced settings…
3. Under Privacy click Content settings…
4. A pop-up window will appear. Under Notifications, choose Do not allow any site to show notifications if you want to block all notifications.