There are 3 typetypes of campaigns you can set up:
Cost Per Visit (CPV): a full page popunder campaign and you’re
paying on a per visit basis, best for advertisers mainly looking
for branding
Cost Per Click (CPC): a text banner and/or image graphical
banner campaign and you’re paying on a per click basis,
best for advertisers on a tight budget
Cost Per Thousand Impressions (CPM): a graphical (rich media)
banner campaign and you’re paying on a per thousand banner
display basis, best for advertisers with rich media banners