Direct answer: Juniper tar is a smoky tar or tar oil traditionally obtained from juniper wood, especially prickly juniper. It is often discussed under the name cade oil.
Juniper tar comes from the heated wood of certain juniper species rather than from pine or birch. The crude tar can be further worked into oils used in perfumery, veterinary products, historical skin preparations, and traditional craft contexts. Its smell is usually tarry, smoky, phenolic, and persistent.
The best-known modern term is cade oil, especially in fragrance and ingredient listings. It has also appeared in traditional topical uses, but this site should not present it as a treatment or home remedy. Its safer content angle is botanical source, material history, scent profile, and the difference between crude tar and rectified oil.
Juniper tar is not the same as ordinary juniper essential oil. Essential oils are usually obtained by distillation of plant material for volatile aroma compounds, while crude juniper tar is linked to destructive distillation and contains heavier smoky fractions.
In short: Associated with Juniperus oxycedrus and the name cade oil. Made from wood rather than berries. Known for a smoky, tar-like odour. Should be handled as a specialist ingredient, not a casual home remedy.