First let's define it TLDR: It comes out of Too long? didn't read (and we find it like tl; dr and tldr;). If you are using a Linux distribution, searching the internet for various errors or your explanations is known. You are also familiar with the "man pages" (from the manual).
These pages provide instructions for use, but very often they contain a lot of details. They are often difficult to understand and lack examples that can help you solve a problem you are facing.
TLDR is another way to read manuals. Instead of showing you a comprehensive guide, with this tool you will only see what is extremely necessary, and with examples please. This way you will be able to focus only on the practical instructions that interest you.
wget, for example. It is a tool used to download files from Internet. For such a simple and everyday Unix utility, wget has a very complex instructions page. 
With the TLDR command, on the other hand, the instructions are summarized in a few sentences, as you can see in the following picture:
For those who are in a hurry or do not want to read, the TLDR is awesome. It should be noted, however, that for some applications, the instructions are extremely vague.
The TLDR for Git, for example, says almost nothing about how to use it, other than version control and how appearances of the Git help pages.
These flaws are easily forgiven, however, especially when you avoid Google searches to understand how something works.
If you want to try it, you can find it on the TLDR project website. The page includes installation instructions and information about how you might be able to help the project.
