I am a european that just got married to an American citizen. We live in Europe now. Is it true that if I apply for the green card, then I have to "use" it, me

I am a european that just got married to an American citizen. We live in Europe now. Is it true that if I apply for the green card, then I have to "use" it, meaning I need to actually move to the US? That is what I have heard.