An ambigram (also sometimes called an inversion or flipscript) in a logo art is a typographical design that reads even when upside-down or flipped horizontally. The word that is turned into an ambigram is not always a palindrome, although it may be. Sometimes the word spelled out from the alternate direction may read a different one.
Designing an ambigram logo requires time, patience, effort, and, of course, a lot of skill. Every ambigram logo is a work of art.