What does Delta MQS mean?

What does Delta MQS mean?

Medallion Qualification Dollars Medallion Qualification Dollars: Medallion Qualification Dollars (MQDs) are the sum total of the SkyMiles Member’s spend on Delta-marketed flights in Main Cabin or above (flight numbers that include the “DL” airline code), inclusive of the base fare and carrier-imposed surcharges, but exclusive of government-imposed …