In a mixing bowl, combine the chicken broth, garlic powder, onion powder, salt, lime juice, and lime zest. Stir well until all the ingredients are integrated, creating a fragrant marinade.

Arrange the boneless skinless chicken breasts in the bottom of the slow cooker, then pour the prepared marinade over the chicken.

Cover the slow cooker and set it to cook on HIGH for 3-4 hours or LOW for 5-6 hours, until the chicken is fork-tender.

Carefully remove the lid and shred the chicken directly in the slow cooker using two forks.

Stir in the chopped cilantro for freshness and mix to combine.

Taste the shredded chicken and adjust seasoning with more lime juice if desired.