Dhoops or dhoop incense are an extruded incense, lacking a core bamboo stick. The most well-known dhoop is probably Chandan Dhoop.
How to burn Dhoop Incense:
Light the tip of the incense stick. Gently extinguish the flame by blowing or fanning. Your dhoop should glow red and give off a delicate wisp of pale fragrant smoke indicating that it is slowly burning or "smoldering." Place it in an appropriate incense burner.