Haji – A person who has performed Hajj (the Islamic pilgrimage to Mecca).
Fazilat – Virtue, merit, excellence, or significance.
So, it could also be translated as:
"The virtues of a Haji" (focusing on the person who has performed Hajj), or
"The virtues of Hajj" (focusing on the pilgrimage itself).
Let me know if you'd like a detailed explanation of the virtues of Hajj according to Islamic teachings.