Crianza is a term used in the wine industry, particularly in Spain, to describe a specific aging process for wines. It typically refers to red wines that have been aged for a minimum of 24 months, with at least 6 months spent in oak barrels. This aging process helps develop the wine's flavors and aromas, contributing to its complexity. In addition to red wines, Crianza can also apply to white wines, which must be aged for a minimum of 18 months, including at least 6 months in oak. The classification of Crianza is part of the broader Denominación de Origen system, which regulates wine quality and production methods in Spain.