Karma yoga is a type of yoga that means 'service to others'. It is a way of helping other people and doing nice things that make the world a better place. When you do things for other people, it is called 'karma', and when you do it in a spiritual way, it's called 'karma yoga'. You might do things like help a friend move, volunteer at a homeless shelter, or do something special for your family. All of these things help to build good karma and make the world a better place.