IGT is the third of Italy’s four levels of wine classification, coming in after the much stricter DOCG and DOC but ahead of vino da tavola. It was originally introduced in recognition of the quality of the Super Tuscans and indicates that the wine is made from grapes from a particular region (and those regions tend to be much larger than those of DOCG & DOC) and rules around production, while they vary, are much more relaxed.