In C++, what is the usage of the const and the static keyword, and how should I apply this to variables in OOP and functions? It is because I am having some trouble in learning how to use these two...

In C++, what is the usage of the const and the static keyword, and how should I apply this to variables in OOP and functions?

It is because I am having some trouble in learning how to use these two keywords, as I see them being used quite frequent and do not understand, but understand it theoratically.