This is the 15828th most frequent Korean word.
봤다고
"봤다고" means "said (that someone) saw."
In this sentence, '봤다고' indirectly reports that someone has said or indicated they watched something.
그 영화 정말 재밌었다고 들었어요.
I heard that the movie was really interesting.
Here, '봤다고' is used to report one's own action of having seen something or someone.
어제 그 친구를 봤다고 기억해.
I remember seeing that friend yesterday.
In this usage, '봤다고' cites information provided by others who claimed to have seen something.