Season the chicken with salt, black pepper, and Italian seasoning.
Place the seasoned chicken in the slow cooker.
Add the minced garlic, chicken broth, and heavy cream. Stir gently to combine.
Cover and cook on low for 4 hours or high for 2 hours, or until the chicken reaches a safe internal temperature and is tender.
Shred the chicken directly in the slow cooker using two forks.
Stir in the grated Parmesan cheese until melted and the sauce becomes creamy. This Slow Cooked Garlic Parmesan Chicken is best served warm.
Garnish with fresh parsley if desired and serve immediately.