The term "tldr" stands for "too long; didn't read." It is often used on the internet and in communication to summarize lengthy content or to express that the content is overly extensive for someone to read in full. Essentially, it serves as a shorthand way to convey that the user has chosen not to engage with a lengthy piece of writing, often followed by a brief summary.
The acronym "tldr" emerged from online forums and social media in the early 2000s, reflecting the growing trend of digital communication where brevity is favored. It captures the sentiment that, in some cases, the complete information is more than the reader is willing or able to process.