This is the 5149th most frequent Russian word.
настоящего
"Real," "genuine," or "present" (depends on context).
Here, "настоящего" qualifies "героя" (hero) as "real, true," emphasizing authenticity or genuineness.
Он является великим примером настоящего героя.
He is a great example of a true hero.
In this context, "настоящего" relates to "успеха" (success), signifying true or substantial success.
Для настоящего успеха требуется много усилий.
Achieving real success requires a lot of effort.
Here, "настоящего" describes "момента" (moment) as present, indicating current time or temporal specificity.