The video provides an overview of the POS tab in the WORK AI system, covering various functionalities such as warehouse management, purchase orders, POS orders, transfers, and reports. In the warehouse section, users can access a warehouse list to import or create new warehouses by providing details such as name, address, city, and zip code. The purchase section allows for the creation of purchase orders by setting up categories, selecting a vendor type, warehouse, category, purchase date, and purchase number, and specifying products or services, quantity, price, and discount. Moving on to the POS tab, users can add customers apply discounts, and create POS orders. The video also explains the process of transferring products between warehouses and delves into the reporting features, including warehouse reports, daily and monthly purchase reports, and POS versus purchase reports.