Your missions are appear in the order that they are published in, but you might have a special mission that your want your ambassadors to see and interact with first.
TIP! Freebie missions are really popular with ambassadors so it's always a good idea to feature them so they appear first under your page on the app!
To do this, all you have to do is set that mission as featured by:
Select the mission you would like to set as featured
Click 'Mission Options'
Click 'Set as featured'
That's it! To see your featured mission, go to your missions page and any mission with the start icon is set as a featured mission.