What is the function of the drag brakes deployed on the booster during descent?
Answer
To help slow the booster down significantly before the engine restart phase
Drag brakes are deployed on the booster to provide substantial deceleration, which is necessary before the main engine restarts for the controlled landing sequence.

#Videos
Blue Origin NS-33 New Shepard launch and landing - YouTube
Related Questions
What is the primary objective of the New Shepard design philosophy?What type of architecture defines the New Shepard vehicle's operation?What altitude does the powered flight phase aim to reach before engine cutoff?What is the function of the drag brakes deployed on the booster during descent?What is the targeted landing speed for the New Shepard booster onto the pad?What component failure caused the booster to be lost during the initial NS-1 test flight in April 2015?For how many successful missions was Propulsion Module NS3 utilized before its destruction?What feature of the capsule's recovery system provides redundancy by requiring multiple components to function for a safe landing?What specific part of the capsule's recovery sequence reduces impact forces to roughly $3.2 ext{ km/h} (2 ext{ mph})$?How many times is the New Shepard booster explicitly designed to be reusable with minimal refurbishment?What material byproduct is exclusively created by the combustion of the BE-3PM engine?