More and more people want to learn how to practice mindfulness meditation. This is wonderful, really, because the practice brings many benefits directly to individuals and, through them, to society at large.
Good article about who should teach meditation. Meditation is not a licensed profession so technically anyone can teach it. However, being well versed, educated and respected in the field is key too. A certification as a Meditation Instructor can also add to your knowledge but also give you recognition within the field and respectability among potential clients.