1. Major source of fiber
2. Two powerful antioxidants
3. Anti-inflammatory help with omega 3 and Vitamin K.
4. Vitamin A
5. Vitamin C
For additional info and some more benefits, you can check out this link.
The way I like kale the best is super easy. Don't buy the kale that's in bags, but choose the greenest, freshest looking bunch you find. Simply strip off the stem (this keeps the kale from being bitter) and chop into bite-sized chunks. Put some olive oil in a frying pan and dump in the kale. Sprinkle with garlic salt and stir-fry several minutes until the kale is cooked, but still a bit al dente. It's OK if you don't like it - but if you do, what a great way to help your body out!
Kale is also a good ingredient for certain types of soups - I've always loved the Zuppa Toscana from Olive Garden which is full of kale. Here's a recipe that's very similar to one I use from Pioneer Woman. There are lots of pictures, but if you scroll down to the bottom, you'll find the ingredients and a simpler set of directions.