[stuxnet79]

In this instance 'moat' simply means an advantage that will prevent direct competitors from undercutting your business.

[throwbadubadu]

Makes sense, thanks for superquick reply :) Then I'd say nothing even close to certain..

[alex_c]

To make it more explicit, the term comes from “castle moat” - a form of defense that makes it more difficult for others to attack your castle (or in this context, more difficult to compete with your product/company).