Jaechul J. answered 10/24/21
Fun Korean Class in English
Simply speaking, it is the same as 'with the help of s/o or s/t' or 'thanks to N'
Let me make some Korean sentences with the following explanation.
1) 나 너 덕분이야 = 나 너 덕이야
It is thanks to you
2) 날씨 덕분에 여행이 완벽해
This trip is perfect thanks to such a nice weather