The Home icon on the app is the landing page and the first thing you will see when you log in. The top section will show Upcoming Events. This section will remain static as you scroll up and down the page.
The bottom section shows Notifications. You can scroll up and down within this section. Any unread notifications will be highlighted in green.
You can click on any notification to view more information. For example, if the notification relates to a discussion, you will be taken directly to that discussion's reply screen.