Frosted glass is a special type of flat or tempered glass demanded for for privacy and decoration reasons. Even though some people utilize films on top of regular glass to accomplish this; this cheap method actually is actually horrible in the long-term as the film wears away leaving a very bad looking appearance.
Frosted glass undergoes a special heating process that results in in a frosty or ice like appearance that encompasses the entire glass and not just a layer.
The benefits include:
Allows natural light to pass through
Provides a great aesthetic appearance
Gives selective privacy