I'm receiving too many notifications - help!

Notifications can be controlled via the personal menu at the top right of the screen and ‘Preferences’. They’re broken down into emails, in-system messages and in-system actions. You can enable and disable as many options as you like here to make sure you’re only getting notified about the events you want to know about. Typically, when ‘Pending Review’ is selected in the ‘Editable resources in the following states will be shown’ category, this can generate a lot of actions. Untick this if you don’t want actions for every resource in ‘Pending Review’. 

Read more about preferences here.