Though not as common in all styles of beer, blending is very important when making beers such as sours or when brewing on the macro level. Blending allows you to achieve your desired flavor or color profile by blending two or more batches of beer together. In some cases, beers of dramatically different ages will be mixed together, like in the case of Rodenbach Grand Cru, where their young ale is mixed with their wood vat two year old ale to create a fuller taste.