The bell icon in the upper right corner of the home page is where notifications are listed. 

For example, if other users clap or comment on your post, you will be able to see them here. 

Clicking the ‘All Read’ function on the top right corner will read all your notifications so that they are cleared in one go. 

If you have no notifications, there will be no number by the bell icon and it’ll simply say, ‘No notifications yet!’ on the Notification page.