Cartesian coordinates are a way to describe the position of a point on a grid. The grid is made up of two lines called the x-axis and the y-axis, which intersect at a point called the origin. The x-axis runs horizontally, while the y-axis runs vertically. Each point on the grid has a unique pair of x and y-coordinates. The x-coordinate tells us how far left or right the point is from the origin, while the y-coordinate tells us how far up or down the point is from the origin. By using Cartesian coordinates, we can precisely identify and locate points on a grid, which will help us position sprites on the stage, etc.