Complex sentence: The New Day is a professional wrestling stable performing in the WWE, composed of Big E, Kofi Kingston, and Xavier Woods, under the SmackDown brand, where they are the current SmackDown Tag Team Champions in their first reign.
Split into simpler sentences: The New Day is a professional wrestling stable performing in the WWE, composed of Big E, Kofi Kingston, and Xavier Woods. They perform on the SmackDown brand, where they are the current SmackDown Tag Team Champions in their first reign.