What is software development mean in a real world?

Question

I'm kinda confused about what is software development mean in a real world explanation and how it differs to mobile and web development.

Answer 1

Mobile and Web development are subsets of software development.

Answer 2

So if I want both then should I choose software development then as a career?

Answer 3

Software development is a very huge scope in the future and if you have a skill so you are richest man.

Answer 4

Thank you everyone!