The B2B E-Commerce Web and Mobile Application is a comprehensive digital platform designed to streamline and automate business-to-business purchasing, sales, and relationship management. The system enables manufacturers, wholesalers, distributors, and retailers to conduct transactions efficiently through a secure, scalable, and user-friendly web and mobile interface. The platform supports bulk ordering, negotiated pricing, role-based access, and custom catalogs, allowing businesses to tailor product visibility and pricing for different clients. Buyers can browse products, place large-volume orders, track shipments, manage invoices, and access order history, while sellers can manage inventory, pricing rules, customer accounts, and promotions in real time. Key features include multi-vendor support, approval workflows, multiple payment options, order tracking, analytics dashboards, and integration with ERP and accounting systems. The mobile application ensures on-the-go access for sales teams and buyers, improving responsiveness and operational efficiency. Overall, the solution enhances supply chain transparency, reduces manual processes, improves customer engagement, and accelerates B2B transactions through a centralized, reliable, and scalable e-commerce ecosystem.