Publishing your image files publishes them to Dynamic Media Image Servers, where they are available to your web site and application. What’s more, during the publishing process, Adobe Dynamic Media Classic activates the URL strings you need for your web site and application.
Master images must be marked for publish for them to be copied to Dynamic Media Image Servers. You can mark your master images for publish in the Browse Panel by clicking Mark for Publish icon. You can also mark images for publish when you upload them to Adobe Dynamic Media Classic.
On the Global Navigation bar, select Publish. On the Publish dialog box, select a When option (One-Time or Recurring), then optionally enter a name for the publish job
Select Submit Publish.
The URL is not active until you publish the asset.