The Paint Editor is Scratch’s built-in image editor. One can create their own sprites and backdrops using it. These images can be used in many ways, each having its own impact on its project. This is one of the features that makes Scratch different from many other programming tools, because many others do not provide a built-in image creator.
A bitmap image has to store color information for each individual pixel that forms the image.
A vector image just has to store the mathematical formulas that make up the image, which take up less space.
This is the drawing area where you can draw a sprite or a backdrop.