Copal is a tree resin that hasn't aged long enough to become amber, and can sometimes be called 'young amber'.
It is extensively used to dispel negativity and bring purification to your space, and can also be used during love workings to cleanse the way for success.
Copal is also offered to many deities, especially Aztec/Mayan/Inca, and Mexican folk spirits such as La Satisima Muerte.
Resin incense needs to be burned upon a charcoal disk - light the disk, place on a heatproof container and add your incense once the disk has turned fully white.
Your purchase comes with a disk to start you off, and I also have packs of 10 disks available under 'Sundries'.