Hello, I took the GMAT and got a 660. But my verbal score was much lower than the quant. 31V 49Q. Should I retake the test? How important it is to get a good verbal score?

It's important, especially for Western schools that have participatory teaching.

Most schools will look for a good balance between the verbal and qualitative portions of the GMAT. If you apply with a high quant score and a low verbal score, they'll have the impression that you're strong in math / science but massively behind in terms of communicating and writing. Since these are two fundamental areas of MBA program (and management in general) that could be problematic

If English is not your primary language, take some classes and work on targeting your weaknesses, because you have a rather large difference between your two scores, which will be a flag to many admissions people.