Smoke from certain herbs and trees produces ions, which wash away free radicals, airborne pathogens and bad energies in general, from the air. The plant and it's smoke is used to set the energy for rituals or to simply keep the air clean, healthy and energetically vibrant in indoor spaces. You can view the practice as a sort of "spiritual hygiene" if you will!
Smoke cleansing is similar to smudging, but is the simple act of incorporating healing plants into your home cleansing rituals.
It’s important to note the difference between the practices in order to pay respect to cultural and spiritual rituals. When we use plant smoke for washing away energies and toxins in everyday life, the term Smoke Wash is much more appropriate.