Ramadan. What does "for the sake of Allah" mean?

I understand like if u say to help somone for the sake of allah, meaning to help them just to please Allah, butwhat does it mean in other cases? Lke I hear, love someone for the sake of Allah. Also, someoe said u should get married for the sake of Allah. Does that mean u don't have to like the person u marry, just tolerate them bc it pleases Allah(sorry that was the only example I could think of)? Honest question. Thanks.