Selling advertisement space to your customers can easily achieved within commerce by adding a new product within Commerce>Store>Products. Before reading this step, it is suggested that you read the previous step. This step will cover the items specifically relating to selecting advertisements as the product type.
When selecting the Advertisement product type, you will be presented with a screen similar to the following. In addition to the many items discussed in the previous step of this guide, you can choose an advertisement location when selecting this type. This will allow you to sell ad space in one or many locations directly to your customers.
You will also be able to set an expiry period for the product, as well as the maximum dimensions for any banners which are uploaded. This allows you control over the size and period that a banner is show for.
Any which are purchased will show up within System>Site Promotion>Advertisements as a pending advertisement. This enables you to ensure that the ads are suitable for your site before showing them.