Voice is a Completely Free Service for charities, non-profits, CICs, voluntary organisations, schools, community groups, sports clubs etc to create a website. (Pretty much anyone apart from limited companies.)
Some of our users have asked us if we provide e-commerce features they can use on their site. The short answer is Not Directly. But that's not to say you can't have an online shop on your Voice website. You can embed a store from a third party provider.
For example, you can set up a free store using Ecwid, then embed it on a page of your site - see below. I used the Raw HTML includelet to put their embed code onto this page.