On the way to the office today, I noticed a delivery truck. Let's call the company Tramer, based in Connecticut.Big sign on the back, with their name and a nice logo.
What were they delivering? What business are they in? Would I want to buy something from them?
I have no idea, which is never a good idea. They certainly had the room on the truck to at least put their category in, or their specific business, or their web address. I don't care if their business is strictly wholesale, or they were just shipping for someone else. Use the "free" space available to you, wherever it is, to tell people about your service, because you simply don't know who will see it and perhaps know someone who is looking for just that item/service.
And hey, you have to paint your truck anyway.