Notifications in the top menu links you to an overview of all the (recent) changes in the items you follow. The changes you made yourself and were made before you followed the item also show in My notifications. This makes My notifications a logbook, where you can view the history of an item.
You can adjust the number of notifications you want to show with the dropdown menu:
A maximum of 250 notifications can be displayed.
With the following icons you can adjust the layout of My notifications.
If you want to view the history per item, you can sort the notifications per item. By clicking Chronological and switching to Per item, the notifications are sorted per item.
You can choose to display the notifications by Detail, with a short description of the notification, or by List, without the description.