Are you being obtuse on purpose?
Or is it natural?
It's on purpose to make the point that advertising serves a purpose.
If advertising has hammered in to me that Tesco sells food and Screwfix sells power tools then my brain has a ready made map of what those chains sell. I don't have to visit and find out for myself.
So you'd go to a hardware store for food? Surely you need to know what they sell.