I really enjoy the subject of marketing.  In my master degree in business I learned a lot about the subject
A degree in masters sounds very flexible. Learning everything from finance, economics, and management sounds very useful.
Master of Business Administration
An MBA (Master of Business Administration) can teach you a lot about accounting, applied statistics, business communication, and much more. I feel like it's very useful!
It is very useful.  Marketing is used by businesses in many ways
I agree, most businesses can use it to promote advertisement, personal selling, direct markets, and public relations.
Yes marketing is considered one the most vital componets of Business Management.  The other being innovation
It is vital for sure. It is also used to create, keep, and satisfy the customers. 
There is something called the 4 p's of marketing that outlines the procedure.  They are product, price, place, and promotion
Wow, I didn't know that. Sounds easy to remember.