With this strategy you can have a menu at the bottom to which you can add the following things:
External Link (web address)
Doing this provides you quicker access to certain screens or options in Marvin.
By clicking on the cog you can access the settings of this strategy and there you can choose which items you'd like to have in your bottom menu. After you hover a certain item you get an option to hide it or to remove it from the bottom menu.