Place the chicken thighs or breasts into the slow cooker, then pour the chicken broth over the top.
Add the rough chopped onion and minced garlic around the chicken, then sprinkle with salt, pepper, and paprika or cumin for flavor.
Cover the slow cooker with the lid and set it to low. Let it cook for about 4 hours, until the chicken is tender and easily pulls apart.
Once cooked, open the lid and check that the chicken is cooked through and tender—use a meat thermometer if needed, aiming for 165°F.
Shred the cooked chicken using two forks directly in the slow cooker or transfer to a cutting board and shred with forks.
Stir the shredded chicken into the juices and seasonings in the slow cooker, letting it soak up the flavorful broth for a few minutes.
If desired, squeeze a little lemon juice or add hot sauce to brighten the flavor before serving.
Serve the moist, tender shredded chicken as a main dish or use it as a filling for tacos, sandwiches, or salads.