In replacing a regular outlet with a GFCI outlet. You only have three wires.
Black(hot) White(Neutral) Green(Ground) on the GFCI outlet.
You have Load terminal/ Line terminal/ the other side there are two
Neutral terminals.

So is the hookup. Hot wire to the line terminal, and white to the neutral terminal.
And of course the ground

What about the load terminal and the other neutral terminal. You just let them alone?

Yes, the load terminals are for adding additional outlets, which would be protected by the GFI.

P.S.
It is a GFI (Ground Fault Interrupter) outlet, and a GFCI (Ground Fault Circuit Interrupter) circuit breaker.

I do not have a Ground Fault Circuit interrupter circuit breaker.
So I would also have to get one of those too?

No, You need it at the Panel or could be just the receptacle. If you were installing 2 recepticles you could hook to the Load side, otherwise, don't connect anything.

I get it. Thanks