Blend Modes

This property determines how Unity blends the lighting with the colors of the spriteA 2D graphic objects. If you are used to working in 3D, Sprites are essentially just standard textures but there are special techniques for combining and managing sprite textures for efficiency and convenience during development. More info
See in Glossary and other GameObjectsThe fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. A GameObject’s functionality is defined by the Components attached to it. More info
See in Glossary that the light affects. The following are some examples of how different Blend Modes affect how a sprite is lit.

Original sprite.	Blend Mode set to Multiply
Blend Mode set to Additive	Blend Mode set to Subtractive