8. The series are Sam’s memories, who’s writing the chronicles of Westeros.
There’s also a theory that suggests that everything we’ve see in the series is told by a narrator. And of course, this narrator is Sam Tarly, who’s supposedly writing the chronicle of Westeros, representing George R. R. Martin — the writer of the original book saga the series is based on.
Fans got really into this theory after Samwell’s conversation with Archmaester Ebrose in season 7. In one of the episodes, the Archmaester gives Sam advice on writing and calls their present “The Chronicles of the Wars Following the Death of King Robert,” on which Sam says he’d choose a more poetic title. And Game of Thrones or A Song of Ice and Fire seem to be exactly what he’d choose.