What are they?

 

They mostly mean the same thing, which is personalising a product with your name, monogram or company logo.

The hot stamping process includes a hot stamping press, a hot stamping die or type, and sometimes a hot stamping foil if you choose to add color to your impression. The hot stamping press contains a heating element that heats up the die or type; the marking cycle starts when the press engages the heated die or type with the foil and transfers the ink from the foil carrier onto the part to be marked. The press then disengages at the end of the marking cycle leaving behind a crisp, permanent, ink impression on the part.

 

A Monogram or wenzel is a motif made by overlapping or combining two or more letters or other graphemes to form one symbol. Monograms are often made by combining the initials of an individual or a company, used as recognisable symbols or logos.

The difference between Embossing and Debossing is whether it is raised or recessed. Embossing is when you press into the medium from underneath and the text or image is raised. Debossing is when the text or image is imprinted from above to cause a depression or indentation in the medium.