Lay the chicken breasts at the bottom of the crockpot.
In a bowl, combine the chicken broth, diced tomatoes, garlic powder, onion powder, Italian seasoning, salt, and black pepper. If using olive oil, add it to this mixture.
Pour the mixture over the chicken breasts in the crockpot, ensuring they are well covered.
Cover the crockpot with its lid and cook on low for 6 hours, or until the chicken is cooked through and tender.
Once cooking is complete, shred the chicken directly in the crockpot using two forks, mixing it with the sauce.
Serve warm, paired with rice, pasta, or steamed veggies.
Optionally, add other vegetables like carrots or bell peppers to the crockpot for added nutrition.