Daily missions are a part of the “Global War” and can only be executed once per day. They will restart 24 hours after the last completion. They originate from your command center, which can be found in your hub once achieving Survivor Power 100 - or joining a previously established Clan Faction.
A typical Daily Mission will be to gather enough troops and supplies to attack enemy strongholds.
Humans may need to infiltrate a zombie hub and get samples of their nests to work on a cure.
Zombies may need to raze a human settlement to bulk up their food stores.
Humans may need to rescue other humans that have been captive as zombie food.
Zombies may need to kidnap a human scientist to help develop stronger zombie characters.