What does cout<<" "; mean?

[Dymensity]

Truly a beginner's question.So,if i dont use cout<<" "; the program would be wrong,why is that,why do i need to use cout<<" ";?

   #include <iostream>
using namespace std;
int main(){
    int n;
    cin>>n;
    cout<<(n*n)*6;
    cout<<" ";
    cout<<n*n*n;
}

[helios]

It just outputs a space.