TL;DR stands for "too long; didnt read" and is internet slang used to indicate that a text being referred to has been ignored because of its length. It is also used to introduce a summary of a lengthy post or article. The term is often seen on social media sites, where it usually accompanies a link, and perhaps a comment, based on the title of the article or something the poster has heard about it. It can be used as a dismissive response to a lengthy online post or to introduce a summary of a lengthy post. The abbreviation provides short summaries of long stretches of text.