A Master Mason is the third and highest degree in Symbolic (Blue Lodge) Freemasonry, representing a full member who has completed a journey of self-discovery through three degrees: Entered Apprentice, Fellow Craft, and Master Mason. Candidates must pass proficiency tests on preceding degrees, with the process typically taking six weeks to six months, though it can vary. Master Masons enjoy full voting rights, can hold office, visit lodges worldwide, and join appendant bodies like the Scottish Rite or Shrine.
https://www.freemason.com/master-mason/