The idea of microtut.com is to provide you with short, concise instructions on how to do a specific task.
You can come back to the site and search for a tutorial to remind you of some facts, how something worked or how something was done, find that very specific bit of information you learnt in the micro tutorial without having to read a lengthy post for just the bit you want.
Learning New Things
If you are looking to learn a new subject then these micro tutorials will allow you to consume a new bit of knowledge in a short amount of time.
Every time you have a few minutes you can pick your next tutorial, read the complete thing without having to come back later or being distracted.
If you are on-hold, you can learn about a specific part of a wider subject in just three or four minutes. (Maximum read time should be five minutes)