Native Americans use smudging for spiritual transformation, raise vibrations or purify a home, room person or object. When Sage is burnt it releases negative ions which in turn allows the purification to occur.
The ritual of sage smudging and purification is intention-based. You do not have to perform the process exactly. In fact, different Native American cultures may vary the process from tribe to tribe. Knowing that if your heart is pure, the effort and intention will be enough.
Smudging is used with many combinations or stand alone herbs, wood and smudge sticks.