Prep the Chicken: Start by placing the chicken breasts in the slow cooker.
Combine Ingredients: In a medium bowl, mix together the chicken broth, diced tomatoes, chopped onion, minced garlic, Italian seasoning, salt, and pepper.
Pour the Mixture: Pour the mixture over the chicken, ensuring it's evenly distributed.
Set Slow Cooker: Cover and cook on low for 4-6 hours or high for 2-3 hours, until the chicken is tender and cooked through.
Shred and Serve: Once done, shred the chicken with two forks and mix it into the juices. Serve over rice, pasta, or enjoy it in wraps!