Blockchain platforms provide the infrastructure for building decentralized applications (dApps) and executing smart contracts. Popular blockchain platforms include Ethereum, Binance Smart Chain, and Solana, each offering unique features like scalability, security, and developer tools. These platforms support industries like finance, supply chain, healthcare, and gaming by allowing for the creation and deployment of blockchain solutions. Blockchain platforms are designed to ensure transparency, decentralization, and immutability, which enhances trust and reduces dependency on centralized systems.