What is the Beatles song Strawberry Fields Forever about?

Strawberry Field was a Salvation Army children's home in whose grounds John Lennon used to play as a boy. During rough times, he would close his eyes, imagining he was there. "Living is easy with eyes closed, misunderstanding all you see."

People always take beatles songs, and turn them into drug inspired satires.

John called the song "Strawberry Fields Forever" as a tribute to remember all of the Strawberry Fields of the world. The actual name of the children's home was Strawberry Field.