Racking is the process by which the suspended material (yeast cells, particles of skins, etc.) is removed from your wine after fermentation.
This is particularly true when 50-gallon wooden barrels, which have greater surface-to-volume ratios than larger containers, are used. The rough wood interiors help the wine to shed any suspended materials.
This is an optional step, but important step, and we would love to have you join us.