The term "Tun" often relates to "TUNE" software or audio tuning settings.
: Used by TUNE (HasOffers) to automate product data feeds and tracking links. You can download these by adding an XML feed creative in the "Creative Files" section of your TUNE account. Download Tun Foot xml
If you have a link to an XML file but it keeps opening in your browser instead of downloading: Right-click the link. Select "Save Link As..." or "Download Linked File." Ensure the file extension ends in .xml rather than .html. How to convert a PDF file to XML easily | Adobe Acrobat The term "Tun" often relates to "TUNE" software