Hover over the 'Creatives' tab and select the creative type. Once you have selected the creative type, find the specific creative within that page that you are interested in using. You can filter within the Creatives section by Advertiser, Advertiser Category, Promotional Type, Date, Banner Size, Deep Linking, Creative ID, and Keywords.
There is also a 'Code Options' section above the creatives. Click the arrow next to 'Code Options', you will be able to select from available options, such as: Website Tracking, SID, Override Destination URL, and Encryption options. Once you have filtered the creative to your desired specifications, click 'Get Code'. Copy and paste the code onto your site.