Select an option from the 'Play a sound when a message is received' menu. If you’re browsing in Incognito mode, you won’t get notifications. By default, Chrome alerts you whenever a website, app, or extension wants to send you notifications. You can set up Chrome to get notifications, like meeting reminders, from websites, apps, and extensions. Slide the “Sound” switch to the On position. Slide the “Notification and Sounds” switch to the On position.