Of course, this is of utmost importance. Getting feedback from people around you, including publishers, editors and agents, is a great way to enhance your skill.
Negative criticism can take you back to the draft as you figure out how to develop your material. Positive criticism, on the other hand, will inspire and encourage you to keep at it, to keep writing, to stay the course. And depending on your approach to your writing, all criticisms are ultimately helpful and can shape your careers positively.