When does notification sound play? It plays only when you enable 'Popup Notification' or 'Browser Notification'. You can choose your notifications sound from the options given. To disable notification sound, click 'None'. What is Popup Notification? If a new 'Featured Deal' is posted, this notification with deal details will popup. On clicking the popup you can go to product page. You can close it by clicking 'X' or outside popup area. Sample popup modal What is Browser Push Notification? Its a web browser feature. By default, you will get this notification when featured, trending, following search deals & following comments...