Place chicken breasts in the bottom of a slow cooker in a single layer.
Sprinkle the taco seasoning on the chicken.
Pour the salsa over the chicken.
Place the lid on the slow cooker and cook on Low for 3-4 hours, or High for about 2 hours (chicken breast is done when the internal temperature reads 165°F).
Shred the chicken using 2 forks or an electric mixer on low speed.
Taste and add salt, if needed. Add more salsa if desired.
Serve with desired garnishes over rice, or in burritos, tacos, or on a salad.