Stones placed across a shallow river to form a step-stone bridge so people can step from each to the next and so cross the river without getting their feet wet: see wiktionary:stepping stone
Stones or shaped concrete blocks (aka pavers or pas japonais), set into the ground and positioned to form a decorative walkway path or entrance (as to a home).
A stepping stone is a type of computer security measure.
This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.