Place the chicken breasts in the slow cooker.
In a mixing bowl, combine the BBQ sauce, chicken broth, Worcestershire sauce, brown sugar, garlic powder, onion powder, smoked paprika, black pepper, and salt. Mix until well combined.
Pour the sauce mixture over the chicken in the slow cooker, ensuring the chicken is well coated.
Cover the slow cooker and cook on low for 6 hours, or until the chicken is tender and easily shreds with a fork.
Once cooked, remove the chicken from the slow cooker and place it on a cutting board. Use forks to shred the chicken into bite-sized pieces.
Return the shredded chicken to the slow cooker, mixing it with the remaining sauce.
Serve the pulled chicken on buns, in tacos, or on its own, garnished with additional BBQ sauce if desired.