A korban is an offering consisting of either an animal or something that grows from the ground (ex. wheat, spices from plants). Korbanot (offerings) are offered on a Mizbeach (altar)- either on the Mizbeach HaOlah (outer alter) or on the Mizbeach HaKetoret (incense altar)- and most of the avodot (parts of the service) involved in the korban are performed by a Kohen (priest). After the Beit HaMikdash (Temple) was finally built on Har HaMoriah (Mount Moriah), it became prohibited to offer korbanot anywhere but in the Beit HaMikdash, on one of it’s two mizbechot (altars). There are four main types of animal korbanot: Olah, Shlamim, Chatat and Asham. Other than the animal korbanot, there are korbanot mincha (grain offerings), as well as the ketoret (incense) which is burned daily on the Mizbeach HaKetoret.