Because of its twisting swirl shape, it burns for a long time, making it effective for large rooms and well-ventilated areas. When you want to put it out, fold it, and insert a metal clip (like the kind used for documents) at the area you want to put out.
For when you want a light burn and a slight fragrance. There are various different types and lengths for room incense, Buddhist altar incense, etc. These linear incense sticks aren't just used for Buddhist purposes anymore.
Light the tip of the cone. As it burns, the amount that burns gets wider, providing for a strong scent in a short amount of time. Very convenient for when you want a scent in a short amount of time. The ashes stay where they burn, so no need to worry about them scattering about.