You publish your art (banner), choose the search parameter or keyword in each section.
A banner is an art. A banner can have several keywords or just one keyword as you wish.
The banner is seen by the public after payment. You can upload as many banners (arts) as you want. You choose which ones to activate when you are satisfied.
The banners can be 728x90px or 468x60px size and they are shown at the top and bottom of the listings of the selected section. There are also options specifically for the mobile version.