Assignment:
Your goal is to brainstorm for a Product or Service that you would like to "sell." You may have a specific hobby or ability (sewing, cleaning, car maintenance and repair, home repair, etc.) that you could try to sell as a Service. Or you might imagine an actual Product that you would like to build / create (a special jam, a new kind of kitchen appliance, etc.). Be sure to choose a product or service that you feel comfortable with, in order to promote it with confidence.
Once you have decided on a Product or Service, please consider all the details that will be help you to develop the description: how it works, the price, the size, shape, etc. so that you can convince your "buyer" that this is the absolute best Product or Service for them.