How to save points in the game?

Question

Android

I am making a clicker game on android (like vk coin) and there was a problem when saving points in the game.
I used PlayerPrefs but for some reason it doesn't save!
How to implement the saving of points when leaving the game, so that when entering, the points would be the same as when leaving!
THE MAIN THING IS TO MAKE IT SIMPLE!
Huge thanks to whoever decides!

Answer 1

PlayerPrefs and use. You just don't know how to cook them. manuals on the Internet wagon