Do Voodoo people worship Satan ?

i know i ignorant calling them "Voodoo people" but i don' know the correct terminology sorry :/ anyways do they worship Satan? my friend keeps telling me that they are Evil and worship Satan ..(btw i don't think there is anything wrong with Satan worshipers) ...(im Agnostic) is that true ? do Witches worship Satan ? ..also what is Witchcraft... sorry i have so many questions :/