FURTHER EXPLANATION
No wonder why our people use to say that experience is the best teacher.
You will learn more from things that happen to you in real life than you will from hearing about or studying things that happen to other people.
However, Experiences could be countable or uncountable:
COUNTABLE: An experience is an event that happens to you or that you are a part of.
UNCOUNTABLE: Experience is the amount of time you have been doing something (especially, a job). He has ten years of experience in law.
We also have positive or negative experience: