Add chicken to a 4-quart slow cooker. Pour broth on top of chicken. Add a few shakes of both salt & pepper. Cover and cook on low for 6 hours.
Remove chicken & shred with 2 forks.
To make more shredded chicken- ingredients stay the same. Add 1 hour of cooking time per each additional 2 chicken breasts. Max of 8 chicken breasts in a 4 quart slow cooker. If you'd like to make even more, switch to a 6 quart cooker and add 1 additional can of broth.