Its donut billboard includes how to buy it. Because it promotes donuts, it is advertising content. It is suitable for the donut he sells is a specific commodity, he hangs this advertising sign to increase sales.
Its doughnut billboards include how to buy. Because it's a douther, it's advertising content. It applies to the doughnuts he sells as a specific commodity, and he hangs the billboard to increase sales.
Its doughnut billboard includes how to buy it. Because it's about promoting doughnuts, it's about advertising. It applies to the doughnut he sells. It's a specific product. He's advertising it to increase sales.<br>