tr()

Can you explain the tr() function in Qt in a more simpler way than the documentation does?

What is the importance of such function?

Thanks.

What part of you struggling with? The documentation is pretty concise.

If you don't care about language translation then you don't have to worry about it, neither if you want to translate languages yourself. You only need to use it if you wish Qt to do the translations for you (based on a translation engine and dictionary which you supply)