A minor in college is an area of concentrated study. But unlike a major, it involves taking fewer classes related to the chosen field of study usually about 18-20 credit hours.
Choosing to do a minor in college is very subjective and changes on a person-to person basis for a variety of reasons. The reasons to pick a minor would be that you have a particular interest you want to study in-depth, but not as a major, or that you simply want to take on some more credits, or that you’re likely to take the courses required for the minor anyways, so registering it officially makes sense.
In this ever-evolving world of today, it is important to distinguish yourself as an applicant while applying for a job or even grad school and a great way of doing that is by minoring in something that complements your major. For example, if you are an engineer, you could get a minor in communications which will give you the administrative and public relations skills, or math which will help you further you understanding on certain topics, or even psychology which can help you develop certain interpersonal skills important for the workplace. A minor might help show the employers that you are willing to go the extra mile and help you climb the workplace ladder.