STEM stand for Science, Technology, Engineering and Math. Yes, I could beat my head against the wall trying to tell you why it's good for you, but let just show you some number.
First from Forbes:
15 Most Valuable College Majors
Notice anything about the types of majors?
How about Kiplinger:
10 Best College Majors for a Lucrative Career
See it yet?
Compare the previous two links with this:
Worst College Majors for Your Career
Still don't get it?
Do some self exploring with this site from the Wall Street Journal.
From College Major to Career
Aside: Moving is always good when you are young. Don't get stuck in the same small town where you grew up.
12 Best Cities for High Paying Jobs