Combine kosher salt, onion powder, ground paprika, Italian seasoning, garlic powder, and black pepper in a small dish.
Place chicken breasts in the slow cooker. Rub the seasoning blend and olive oil over the chicken breasts.
Pour chicken broth into the slow cooker.
Cook on HIGH for 2-4 hours, or on LOW for up to 8 hours, until the chicken reaches 165°F internally.
Slice or shred the chicken breasts with two forks, by hand, or in the bowl of a stand mixer fitted with the paddle attachment.