From your 'My Hub' page (please see below)
If you go to the 'Menu' icon in the top right...
then select 'Settings' from the options
Click 'Features from the 3 options at the top of your page
And select 'Notifications' on the left-hand side
Which will then allow you to switch on your preferred method of notifications and how often.
Remember to save by hitting the 'Update Notifications' button.