Blockchain in ecommerce revolutionizes online transactions by ensuring security, transparency, and efficiency. It enables secure peer-to-peer payments, decentralized supply chains, and smart contracts that automate processes. Blockchain reduces fraud, enhances customer trust, and provides a transparent record of transactions. Platforms like Shopify and Overstock are already integrating blockchain technology, improving authentication, product tracking, and payment systems. As blockchain adoption grows, ecommerce businesses can enhance user experiences and streamline operations, creating new opportunities for innovation and growth.