A sage smudge stick is a bundle of dried sage leaves that are tightly bound together. It's commonly used in smudging rituals to cleanse and purify a space. Sage has been used for centuries by various cultures for its believed spiritual and healing properties. When lit, the smudge stick produces smoke that is believed to help clear negative energy and promote positive energy in the environment. It's important to note that smudging is a personal practice and can be adapted to suit individual preferences.