For retail, the useful modules start with Point of Sale for checkout and Inventory for real-time stock tracking. Odoo retail management relies heavily on Sales for order processing, Accounting for financial tracking, and CRM for customer insights. Odoo ERP for retail industry includes Purchase for supplier management, Ecommerce for online selling, and Website Builder for your storefront. Odoo retail inventory management ties everything together with loyalty programs and email marketing modules. Together, these modules create a complete retail system with seamless data flow.