Master of Business Administration is a type of post graduate and a professional degree.
It is a very popular degree to be pursued in the world.
As you have asked for the motivation to study for MBA, I am giving you some reasons to go for MBA

Career Progression

For many MBA students, the major inspiration for completing a PG level qualification is to position them strongly in a competitive job market.
The knowledge and respect gained from completing specialist business qualifications is usually considered to be beneficial for a range of roles across all industries

Alternative Opportunities

It can also have significant benefits for students looking to start their own businesses.

Diversifying Knowledge

It can allow them to expand their skills and build confidence in every element of a business. Most MBA programmes include courses around Leadership, Management, Finance, Accounting, Marketing, Human Resources and Operations

Personal Growth

Personal reasons and motivations are, for some people, a far stronger motivation than the potential career opportunities.

Higher salary

The regular salary for an MBA graduate is considerably higher than that of an employee with a regular master qualification.

A holistic perspective over the business world

Through studying an MBA you become part of a great network of professionals and companies and you continually challenge yourself with the newest problem-solving.
These things together give you a great overview of the business world, a deep understanding and certain receptiveness to the slight changes of this environment