The handwriting of person is said to define a person. that's precisely why everyone, especially teachers stress on having a neat and legible handwriting. handwriting can be improved by many ways, and again depends on the person , which method he wants to adopt. ad of my opinion , i had opted to go to calligraphy classes , as it all about the style and the neatness of your handwriting.
handwriting really helps us in all psalms of life. if we write rubbish , but it looks so neat, the reader , will really not feel like reading the answer , and as for the invigilator , he would give you marks , just for that neat handwriting. it is always an advantage point to have a legible handwriting