It has been suggested that this article be renamed to Yu-Gi-Oh! Master Duel missions. (discuss) The reason given was: Bracketed text should only be used if the base page name is also used for something else. "Mission" on its own is too vague.
Missions are a series of tasks a player can perform in Yu-Gi-Oh! Master Duel to earn rewards like Gems or Titles.
Missions come in different varieties, ranging from Daily Missions that show up each day, temporary Event Missions, or Lifetime Missions meant to be accomplished over a long period of time.
Mission progress is usually recorded in Ranked or Event Duels unless stated otherwise. If a player surrenders a Duel they will not get any progress to active Missions.
Daily, Login, and DUEL LIVE Missions are granted at 18:00 UTC everyday for each day of the month, but the progress resets on the last day of the current month at 18:00 UTC so the process can repeat again.
Each Daily Mission awards 40 Gems. The player receives three different Daily Missions at a time whenever they log in, and can stock up to nine different ones at once. All unfinished Daily Missions are wiped at the start of each month.