Just recently we've introduced AdTag as a new publish option. Technically speaking, the AdTag is an embed code that is customized to be used on a predefined list of ad networks. The AdTag is built to meet the technical requirements for a list of ad networks and can handle significant traffic volumes that your campaigns can generate. On the other hand, the embed code that is for general purpose can only cope with light to medium traffic from personal websites or smaller publications. Impressions generated by AdTags are billed separately. If you want to export custom AdTag for your banners you will have to activate the ad serving Add-on. To see how you can do that please continue reading our related help article.