This is the 15145th most frequent Korean word.
방문했고
"Visited."
In this sentence, '방문했고' means 'visited and' and indicates that the subject 'he' both visited the friend's house and subsequently had a good time.
그는 친구의 집을 방문했고 즐거운 시간을 보냈습니다.
He visited his friend's house and had a good time.
Here, '방문했고' connects the act of visiting the museum to the learning of information, showing the progression of events.
우리는 박물관을 방문했고 많은 정보를 배웠습니다.
We visited the museum and learned a lot of information.
In this sentence, '방문했고' is used to show sequential actions of visiting the school followed by meeting the principal.