order of types, what does that mean?

Question

i'm new to c++,

in the link here

it's said

Compare order of types [...] This implementation-specific order is not necessarily related to size, inheritance relations or declaration order, and may differ between programs.

I don't understand the meaning of "order of types", the author shows an example with base type char and int

#include <iostream>   // std::cout
#include <typeinfo>   // operator typeid

int main() {
  if ( typeid(int).before(typeid(char)) )
    std::cout << "int goes before char in this implementation.\n";
  else
    std::cout << "char goes before int in this implementation.\n";

  return 0;
}