Advertising campaign is a course of action to promote our product.
Both seller and buyer can create ads and they can edit or remove ads at any time if they wish.
While creating adwords they need to fill out following details such as ad name, title, content, URL, banner image and chooses days of week and targeted sections for displaying ads.
So to create a campaign, the ad owner has to spend minimum of $2 for each click and $5 for the day to display the ads to other party.