We have made some improvements to the way we handle third-party tags.
The new feature is called automatic third-party tag detection. What it does is that it allows you to post multiple tags in a text area and we will automatically find each individual tag and create a separate creative for it.
This is a time saver if you get huge text documents with multiple tags for multiple dimensions and placements. With this new feature you simply copy the content of the document, paste it in to a text area and click submit.