Definitions
There are 2 meanings of the phrase
Stepping Stone.
Stepping Stone - as a noun
A stone in a marsh or shallow water that can be stepped on in crossing
Any means of advancement
Example: "The job was just a stepping stone on his way to fame and riches"
Example Sentences
"She sees the job as a stepping stone to better opportunities."
"Learning to ride a bike without training wheels is a stepping stone to learning how to ride a motorcycle."
"His first album was a stepping stone to his successful music career."
"Earning a college degree can be a valuable stepping stone to a successful career."
"The internship served as a stepping stone to a permanent position."