Pour broth into pot with breasts (thighs would work too). Season with a bit of salt and pepper on top.
Close the pressure cooker lid, the one that is not attached, close steam valve to closed.
Press on, pressure cook, 10 minutes and then start. When timing is up allow to naturally release steam for 5 minutes, then release rest of steam. (timing is for boneless skinless medium size breasts or thighs up to 4, if much larger you may need to increase timing)
Use two forks to shred meat. If you want sauced, drain liquid in pot and pour on sauce, use tongs to toss together to coat and serve on slider buns.
Video
Notes
With Frozen Breasts
For frozen you don't want larger than medium sizes, boneless skinless, and they need to be broken apart and separated. Follow directions above except set to 13 minutes for the cook time instead of 5 to get tender.