The full form of XOXOXOX is Hugs, Kisses, …. It’s used on Text Messaging & SMS.

XOX, or XOXO, means hugs and kisses, with the x representing kisses and the o representing hugs. It’s usually used as a lighthearted way of expressing affection, sincerity, or deep friendship.

Hugs and kisses, abbreviated in North America as XO or XOXO, is an informal term used for expressing sincerity, faith, love, or good friendship at the end of a written letter, email or text message. In the United Kingdom, the phrase ‘hugs and kisses’ is widely used but XO or XOXO are not (though X, XX etc. for ‘kisses’ is).

The short answer to “Why does XO stand for hugs and kisses?” is that we don’t know. According to Marcel Denasi, professor of semiotics and linguistic anthropology at the University of Toronto and author of The History of the Kiss: The Birth of Popular Culture, no one has kept a written record of why the symbols of XOXO were used; they simply began using them in letter writing.