The posture has you sitting on the ground, legs wide, knees somewhat towards the ceiling, elbows stuck to your waist, head down, shoulders rounded...
One thing people will try to do when you’re in the Panda is to go behind you....
The Panda is essentially the first position that is available after someone passes your legs when you’re in a seated position.
Defensive BJJ will help you not lose matches, but it won’t win you any.