Hugs and kisses or xoxo is a term used for expressing affection or good friendship at the end of a written letter, email

Email

Electronic mail, commonly known as email or e-mail, is a method of exchanging digital messages from an author to one or more recipients. Modern email operates across the Internet or other computer networks. Some early email systems required that the author and the recipient both be online at the...

 or SMS

SMS

SMS is a form of text messaging communication on phones and mobile phones. The terms SMS or sms may also refer to:- Computer hardware :...

text message. Some sources discuss the possibility of "x" referring to hugs and "o" referring to kisses. However, other sources indicate that "x" is used to signify a kiss and "o" is used to signify a hug. The use of "x" to signify a kiss dates back to as early as 1765.