Campaigns allow you to determine how long you wish each ad to be displayed on your website. To edit and add campaigns, click the Campaigns tab in the left of the Ads page.
Here, you can edit existing campaign by clicking the advertiser's name beneath the Advertiser Name field.
Or, you can add a new campaign by pressing the green + Add a New Campaign button.
You will be brought to the Add a New Campaign menu where you can choose the advertiser, add a campaign name, and set start and end dates.
When you are finished entering each field, you can save and return by selecting Save Campaign, save and add another campaign by selecting Save & Add Another or cancel adding the campaign by pressing Cancel.