What's the meaning of the beginning verse of Stairway to Heaven?

There's a lady who's sure all that glitters is gold
And she's buying the stairway to heaven.
When she gets there she knows, if the stores are all closed
With a word she can get what she came for.
She's buying the stairway to heaven.

Those are the lyrics. I'd really appreciate ANYONE giving me any
ideas. Thanks:)