Warehousing is the act of storing goods that will be sold or distributed later. While a small, home-based business might be warehousing products in a spare room, basement, or garage, larger businesses typically own or rent space in a building that is specifically designed for storage.

A warehouse is a commercial building generally used for storage of goods and warehousing is the process of proper storage and handling of goods and cargo using scientific methods in the warehouse and making them available easily and smoothly when needed

Basically, a warehouse is great for storing surplus goods, which customers and clients don't need immediately. Most companies usually produce goods in anticipation of demand. This means they'll need adequate storage for their surplus goods until their customers and clients start putting in orders.