This is the 9823rd most frequent Korean word.
고흥에서
"From Goheung" or "In Goheung" (Goheung is a place in South Korea).
In this sentence, '고흥에서' indicates the location, Goheung, where the action (buying tangerines) took place.
고흥에서 나는 신선한 귤을 샀습니다.
I bought fresh tangerines in Goheung.
Here, '고흥에서' specifies Goheung as the location involved in the event (moving).
고흥에서 나의 친구가 이사를 했어요.
My friend moved to Goheung.
In this usage, '고흥에서' sets the scene in Goheung for the description of the activity (walking and enjoying).