Prestige
From Pokemon Go Wiki
It is needed to Level Up Gyms. Increased Gym levels would also give more slots for defending Pokemon and it would increase the Gym’s defense.
Training or battling with friendly Gyms would increase its Prestige points. Every win in Training gives 50 Prestige points. The required prestige points for the Gym to level up is listed below:
- Level 1 to Level 2 = 500 Prestige points
- Level 2 to Level 3 = 1000 Prestige points
- Level 3 to Level 4 = 2000 Prestige points
