Palo Santo (Sacred Wood in Spanish), from the citrus family, is a magical wise tree that grows in South America. With a long history of use by indigenous cultures, the wood has traditionally been used in ritual and ceremony for its purifying gifts (similar to the use of Sage). It’s sweet soft citrus-like smell is calming and uplifting, grounding and clearing. Its qualities offer us wonderful support for inward connection (meditation, and sustained concentration), for calming the overreacting mind, and for strengthening our connection to Earth. It has been used for ease of colds, stress, anxiety, depression, inflammation, and emotional pain. The oil is high in limonene, a natural purifier.
A good article about Palo Santo: Link