Reflection in computer graphics is used to emulate reflective objects like mirrors and shiny surfaces.

Reflection is accomplished in a ray trace renderer by following a ray from the eye to the mirror and then calculating where it bounces from, and continuing the process until no surface is found, or a non-reflective surface is found. Reflection on a shiny surface like wood or tile can add to the photorealistic effects of a 3D rendering.

Polished - A polished Reflection is an undisturbed reflection, like a mirror or chrome.
Blurry - A blurry Reflection means that tiny random bumps on the surface of the material cause the Reflection to be blurry.
****llic - A Reflection is ****llic if the highlights and reflections retain the color of the reflective object.
Glossy - This term can be misused. Sometimes, it is a setting which is the opposite of Blurry (e.g. when "glossiness" has a low value, the Reflection is blurry). However, some people use the term "Glossy Reflection" as a synonym for "Blurred Reflection." Glossy used in this context means that the Reflection is actually blurred.