"TY" is an acronym that stands for "Thank You". It is commonly used over text and on social media platforms like TikTok, Twitter, Instagram, Facebook, Snapchat, and more. It is a shorthand way to type "thank you" and can be all lowercase ("ty"), uppercase ("TY"), or capitalized ("Ty") . "TY" is a casual abbreviation and wont appear in formal communication, like in an email to or from your boss.

It is important to note that "TY" can also have other meanings depending on the context. For example, in English, "-ty" is a suffix of numerals denoting multiples of ten. In addition, "TY" can be an abbreviation for other phrases such as "Type (nomenclature)" or "Too Young". However, in the context of text messaging and social media, "TY" almost always means "Thank You".