TTYL stands for "Talk To You Later." It is commonly used in casual conversations, especially in text messaging and online communication. The acronym serves as a friendly way to indicate that the conversation is ending but that the speaker intends to reconnect in the future. This phrase is part of a broader trend of using acronyms and abbreviations in digital communication, similar to other expressions like LOL (Laugh Out Loud) and BRB (Be Right Back). TTYL reflects the informal nature of online interactions, making it easier for people to communicate quickly.