I am running an ad campaign on my blog, but have no earnings.

• Firstly, do check your email if you receive any notification about incoming CPM advertisements, or check your Buffered Earnings under Earnings if you have any new mCPM campaign running for that particular ad unit. If you have, the campaign is running and the earnings will only be credited when it ends.
• If there are no email notifications or any new mCPM campaigns in your Earnings section, then the ad that you saw is a CPC campaign.
• CPC campaign - Launched on advertisers' request. Will show on all blogs under Nuffnang network which have 'Show Global CPC Ads' selected under their Blog Preferences in Blog Manager which are not serving any CPM campaigns at the moment it is launched. Pay bloggers based on the number of unique clicks by their blog's unique visitors on the ad unit which is displaying the CPC ad. Will cease once it reaches its maximum clicks and update all bloggers' account whose blogs generated genuine clicks during the campaign. If a blog showed the CPC ad but did not generate any clicks towards the campaign, no earnings will be updated.