Shader Language is a specialized programming language used to create visual effects in computer graphics. It allows developers to write instructions for the GPU (Graphics Processing Unit) to manipulate how images are rendered on the screen. Commonly used in video games and simulations, shader languages help achieve realistic lighting, shadows, and textures. There are several types of shader languages, with GLSL (OpenGL Shading Language) and HLSL (High-Level Shading Language) being the most popular. These languages enable programmers to define vertex and fragment shaders, which control the appearance of 3D models and surfaces in real-time graphics applications.