Permanent make-up or PMU is the application of pigments with a certain type of needle / hygiene module which is inserted into the dermis (upper layer of the Dermis). As a result, it is also semi-permanent make up, it will fade over time.
Permanent make-up looks like a tattoo in terms of technique, but the purpose is different. In a tattoo, the ink is brought deeper into the skin (Dermis) with the intention that it stays in the skin permanently.
Other words for permanent make-up are: