Prepare the Chicken. Start by seasoning the chicken breasts with olive oil, salt, pepper, garlic powder, onion powder, cumin, chili powder, and paprika. Place the chicken in the slow cooker.
Add Liquid Ingredients. Pour in the lime juice and chicken broth. This will keep the chicken moist and infuse it with additional flavor.
Cook. Cover and cook on low for 6-7 hours or on high for 3-4 hours, until the chicken is tender and easily shredded.
Shred the Chicken. Once the chicken is cooked, remove it from the slow cooker and shred it using two forks. Return the shredded chicken to the slow cooker to soak up the juices.
Warm the Tortillas. While the chicken is soaking up the flavors, warm the corn tortillas. You can do this on a skillet or directly over a gas flame for a slightly charred, authentic taste.
Assemble the Tacos. Fill each tortilla with a generous portion of shredded chicken. Top with cilantro, diced onion, and any additional toppings you like.
Serve. Serve the tacos warm with lime wedges on the side for squeezing.