Final answer:
Sage is the herb traditionally burned in the practice of smudging to clear a house of bad energy, a ritual with origins in the spiritual practices of some Indigenous cultures.
Step-by-step explanation:
The herb commonly burned to rid a house of bad energy in a practice called smudging is sage. Smudging is a traditional ceremony amongst some Indigenous peoples of the Americas which involves the burning of sacred herbs for spiritual cleansing or blessing. The smoke is believed to cleanse negative energy, a practice with similarities to the use of incense in various spiritual traditions across the world. It's important to approach this practice with respect for its cultural origins and understand its spiritual significance beyond a mere trend or household tip.