Incense and smudging items are used in ritual, energy cleansing and spiritual work. Incense is a great way to make your home smell amazing as well.
Smudging is often used to clear the energy in your home, self or work space. It is also used to remove negative energy from objects brought into your spaces. Second hand items are a good example and should always be smudged. New books and tarot/oracle cards are often smudged as well.
This is a sacred energy clearing technique that has been used for thousands of years by numerous cultures.