Blockchain in ecommerce enhances transparency, security, and efficiency by decentralizing transactions. It ensures secure, tamper-proof records of transactions, reducing fraud and improving customer trust. Blockchain also enables faster payments, seamless supply chain tracking, and tokenization of products, offering customers new ways to interact with brands. By leveraging smart contracts and distributed ledgers, ecommerce businesses can streamline operations, enhance customer experiences, and create decentralized marketplaces that are more secure and transparent than traditional platforms.