Avalanche blockchain is a decentralized platform designed for high-performance applications and custom blockchain networks. It is known for its scalability, speed, and low transaction costs. Avalanche features a unique consensus protocol, the Avalanche Consensus, which allows for high throughput and finality times under one second. It supports smart contracts and decentralized applications (dApps), enabling a wide range of use cases, including DeFi, NFTs, and enterprise applications. Its flexible architecture allows developers to create tailored blockchains with specific governance and compliance rules.