Embossing makes something stand out from the page. It impresses an image or text into a surface using an engraved metal die. This creates a raised impression. If the impression is to be sunk, it is known as 'debossing'. You might also have come across the terms 'blind embossing', which means that no foiling or printing is required, and 'foil embossing' where foil is used in the process.
Embossing/debossing gives elegance to all kinds of printed materials including stationery and envelopes, invitations, wedding cards, thank you notes, gift bags and other promotional goods.