The letter "Æ" is a character known as "ash," used in several languages, including Old English and Danish. It represents a vowel sound that is a blend of "a" and "e." In modern usage, it can be found in some proper nouns and loanwords, particularly in Scandinavian languages. In typography, "Æ" is considered a ligature, which means it combines two letters into one symbol. This character is often used in phonetics to denote specific sounds. While not commonly used in English today, it remains an important part of the alphabets of certain languages and historical texts.