A land grant is the first document about your property. Land grants come from when Britain was trying to get people to move to Canada. The King would grant people land, and if they did the few things that the King wanted them to do on the land, like build a house and clear some of the trees, that land would be transferred to the person through a Crown Land Grant. For more information see the OLA's land grant package.
Click the button above this to go to the Ontario Landowners Association's package about Land Grants. The package has lots of information about land grants, and an explanation written by Marlene Black, the editor of the Landowner Magazine.