What is the mastery rank system in Warframe?

The Mastery Rank system in Warframe serves as a reflection of a player's overall progression and experience within the game. Players can increase their Mastery Rank—their account's level—by earning Mastery Points through various activities, primarily by leveling up new Warframes, weapons, companions, and archwings. Each rank unlocks additional benefits, such as increased base mod capacity for gear, higher daily trading limits, larger storage for void traces, and the ability to access more powerful weapons and quests. Players must complete a unique challenge or test to advance to the next Mastery Rank, with each test designed to assess their proficiency in various aspects of the game. Mastery Ranks are not only a measure of the player's time investment but also demonstrate their skill and breadth of experience with Warframe's diverse systems.