Edge, the term, is really popular in IIoT/5G space. It's now a continuum of services - Cloud, Fog/Edge, Mist, Dew. I agree that some of it is just marketing jargon but Fog/Edge as a concept is now well understood.
References:
(1) Open Fog Consortium (https://www.openfogconsortium.org/)
(2) Edge Computing (https://en.wikipedia.org/wiki/Edge_computing)
I don't know it. So others who might otherwise be interested might not know it as well. So it would be nice to provide a small hint. That should'nt be that hard. As a startup, you cannot afford arrogance, if you want to succeed.