Open the Creative Groups page and click on the Creative Group name that contains the Ad or Ads you wish to push.
From the Creative Group Details screen, select which Ads you wish to push by clicking on the select box on the left of the ads. Make any edits you need, such as editing the URL or Headline.
Once you are finished, click Upload and select which Network you wish to push the ads to.
Select the Account and all Campaigns you wish to push the selected Ads to. Note the #Ads in the Summary window should reflect the number of ads you wish to push. Click Upload to push them, or Schedule them for later.