The poem The Road Not Taken by Robert Frost is about a traveler who comes to a fork in the road in a yellow wood and must choose which path to follow. While both paths look equally fair, the traveler chooses the less traveled path, believing it will make the biggest difference. The poem uses the metaphor of diverging roads to represent important life choices and symbolizes the theme that choosing the unconventional or less popular option can lead to a more meaningful outcome.