A Warehouse Management System (WMS) is a software application, designed to support Warehouse or Distribution Center

1. Management in their daily planning, organizing, staffing, directing, and controlling the utilization of available resources, to move and store materials into, within, and out of a warehouse 
2. Staff in the performance of material movement and storage in and around a warehouse.

Warehouses Management Systems are primarily tactical tools, purchased and used by businesses to satisfy the unique customer demand requirements of their supply chain(s) and distribution channel(s), when the inventory and workload are larger than can be handled manually, with spreadsheets. Motivation to purchase generally comes from need to support sales growth or improve performance, and occasionally both.