Blockchain interoperability allows different networks to communicate, transfer assets, and execute cross-chain transactions, enhancing liquidity and functionality. Interoperability protocols like Polkadot, Cosmos, and Chainlink’s CCIP enable seamless asset transfers between Ethereum, Binance Smart Chain, and Solana. Cross-chain bridges, atomic swaps, and Layer 0 solutions facilitate scalability, liquidity aggregation, and trustless interoperability. Challenges include bridge security vulnerabilities, fragmentation of standards, and smart contract compatibility issues. As multi-chain ecosystems evolve, decentralized identity, cross-chain governance, and liquidity aggregation models redefine blockchain interactions.