What is "Godspeed"?

Question

Title says it all. What does it really mean? What is its origin?

Answer 1

This is from Oxford Concise Dictionary:

exclamation: Godspeed

1. an expression of good wishes to a person starting a journey.
2. "she wished him godspeed"

Origin

Middle English: from God speed you ‘may God help you prosper’.

Godspeed on where you go from here. :)