What is a "Campaign"?

Campaigns are used to organize your offers. For example, you might have one campaign to organize offers for selling DVDs and another campaign to organize offers for selling books. A campaign can organize as many offers as you want. Other than organization you are able to set a budget at the campaign level for all the offers under it. A campaign by itself does not generate leads, but you can't have an offer without a campaign. Finally, a single offer can only be contained within one campaign.