|experience vs experience(s)||
Experience can be used as an uncountable noun. You use it when you're talking about knowledge or skill which is obtained from doing, seeing or feeling things.
For example: Do you have any experience of working internationally?
Experience(s) is also a countable noun, but when you use it the countable form you are talking about a particular incident or incidents that affect you.
For example: It was interesting hearing about his experiences during the war.
Experience can also be a verb. It means something that happens to you, or something you feel.
For example: When I first moved to Germany I experienced a lot of problems.
Thanks to Ngoc Khanh