Canola refers to both an edible oil (canola oil) and a type of rapeseed.
The plant is a cultivar of Brassica napus, Brassica rapa or Brassica juncea. They are well known for their seeds, from which the canola cooking oil is made. The oil is widely used for preparing food, It has very little saturated fat (less than 10%), a lot of monounsaturated fat (about 60%), and plenty of polyunsaturated fats (about 30%).
Besides cooking, there are also other ways to use canola oil. One of these is to produce biodiesel fuel for cars and trucks.