Add 2-3 pounds chicken breasts, 1 cup chicken broth, 1 teaspoon salt, and ½ teaspoon pepper to the Instant Pot.
Place the lid on and set the lid valve to the "sealing" position. Cook on high pressure for 25 minutes. After the cook time, do a quick release on the pressure by moving the valve on the lid to the "venting" position.
Remove the lid and shred the chicken with 2 forks.