What is TL;DR?

Also called TLDR, too long; didn't read.

TL;DR stands for "too long; didn't read". Writers now put it before a one- or two-line summary of a long post, so readers get the main point without reading everything.

Why it matters

Most people scroll quickly. A TL;DR line at the top or bottom of a long LinkedIn post, a thread or a newsletter gives busy readers the takeaway in seconds, and the ones who are interested read on. It also forces you to decide what your main point is, which usually makes the whole post clearer.

Example

An accountant writes a long LinkedIn post about a tax deadline. The first line reads: "TL;DR: if you're self-employed, file before 31 January and set aside money for your July payment." The detail follows below.

How businesses use TL;DR

Use TL;DR when the post is long enough that someone could miss the point. Keep the summary to one sentence where you can.

  • Long LinkedIn posts, especially guides, case studies or opinion pieces.
  • X threads: put the TL;DR in the first post so the thread is useful even if people stop there.
  • Captions that explain a process, a policy change or a new price list.
  • Newsletters and blog posts, as a summary box at the top.
  • Announcements with fine print, such as new opening hours or a change to delivery charges, where the key fact must not get lost.

When not to use it

Said to a person, "TL;DR" on its own means "I didn't bother reading this", which is rude. Don't reply to a customer's long message or complaint with it. And if your post needs a TL;DR to make sense, ask whether the post itself could be shorter. A short post with a clear first line often does better than a long one with a summary.

How to write a good TL;DR

A TL;DR is a promise that the reader can stop here and still get the point.

  1. Write the post first, then ask: what is the one thing I want people to remember or do?
  2. Put that in one sentence, using the reader's words rather than jargon.
  3. Include any date, number or action that matters, such as a deadline or a price.
  4. Read it alone. If it makes sense without the rest of the post, it's done.

Common questions

Should the TL;DR go at the start or the end?

Either is fine. At the start, it acts like a headline and helps people decide whether to read on. At the end, it works as a recap. On social media, the start is usually better because only the first lines show before "more".

Is it TL;DR or TLDR?

Both are used. TL;DR with the semicolon is the traditional spelling; TLDR is common on phones because it is quicker to type.

Can I use TL;DR in work emails?

In many workplaces, yes, especially at the top of a long update. With customers or formal contacts, "In short:" or "Summary:" does the same job and reads more politely.

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