IntelliJ directory - small blue dot label in maven

Question

So, I am working on a java / scala maven project in IntelliJ. I created a new directory and populated it with src and test stuff, but it does not behave the same as other directories.

What does the small blue square mean? It is important? How to make my new directory (second) the same?

Thanks in advance, sorry if this is a stupid question.

Answer 1

This means that the folder is defined as an Intellij Module.

Full list of Intellij icons: https://www.jetbrains.com/idea/help/symbols.html