This one seller states the following:
"Protecting and restoring the wood finish on cutting boards, butcher blocks, wood utensils, counter tops, salad bowls and more, our cutting board wax keeps your cutting boards looking shiny and new. The soft wax finish fills in small cracks and and scratches to keep out bacteria and simultaneously prevent water from penetrating the board. Serving also to seal in your mineral oil our special blend helps prevent wood from drying out and splitting.
We highly recommend use of both cutting board oil and wax together for best results."
Wood already has antibacterial properties. I’m not sure of these benefits.