Question

How did spain benefit from the treaty of tordesillas and line of demarcation

Answer 1

Spain won exploration and trading rights over half of the non-European world.

Answer 2

Spain benefited from the Treaty of Tordesillas winning exploration and trading rights over half of the non-European world. ... To the west of that line, Spain would have exclusivity of exploration and establishment of colonies, the same with respect to Portugal to the east of that dividing line.