Embossing
Embossing is most commonly used on pieces like pocket folders, business cards, stationery, promotional pieces and covers. It can be used by itself to create a blind emboss, or combined with printing or foil stamping to help make certain areas of the piece literally stand out.
How the Embossing Process Works

This emboss for a pocket folder was created with a single level die.
An emboss or deboss is produced through a combination of heat and pressure using an etched or sculpted die and counterdie to produce a relief in the stock that is either raised (embossed) or recessed (debossed) process in which paper is pressed into a relief using heat and pressure.
Depending on the desired outcome, budget and artwork being used, an emboss can be created through the use of either a simple, single level die or a more complex sculpted multi-level die.