Blockchain in ecommerce enhances transparency, trust, and efficiency in digital transactions. It supports decentralized payment systems, verifiable supply chains, counterfeit protection, and secure customer data storage. Smart contracts automate order fulfillment and refunds, reducing fraud and operational costs. Tokenization enables loyalty rewards and alternative payment options like cryptocurrencies. Blockchain also allows for peer-to-peer marketplaces without intermediaries. By integrating blockchain, eCommerce businesses can offer a more secure, reliable, and transparent shopping experience, improving customer trust and streamlining cross-border operations.