i am in my last semester of post graduate diploma in management in the field of OPERATIONS, i need to know how much useful a six sigma green or black belt course will be helpful for my future as i am just a fresher. please advice

i am in my last semester of post graduate diploma in management in the field of OPERATIONS, i need to know how much useful a six sigma green or black belt course will be helpful for my future as i am just a fresher. please advice