Many schools and universities now allow students to earn an MBA online. Why should students who already have a business degree go on to get a masters of business administration? An MBA makes a job seeker more marketable and the enhanced knowledge and skills it provides may get an employee a raise or promotion. Some employers, such as government agencies, require an MBA for certain plum positions. Job seekers who want to move into a specific sector or switch careers may also get an MBA with a concentration of courses in the desired subject. An MBA will also be useful to a student who plans to open a business.