BNB plays a significant role in decentralized finance (DeFi) as the native token of the Binance ecosystem and BNB Chain. It acts as both a utility and governance asset, enabling users to interact efficiently with various DeFi applications.

One of the primary roles of BNB in DeFi is paying transaction fees on BNB Chain. Its relatively low fees and fast processing times make it attractive for users engaging in activities such as trading, lending, and staking. This cost efficiency has contributed to the rapid growth of DeFi platforms built on the network.

BNB is also widely used in staking and yield farming. Users can lock their BNB tokens in liquidity pools to earn rewards, helping to provide liquidity for decentralized exchanges and other financial protocols. In return, participants receive interest or additional tokens, making BNB a key asset for passive income strategies.

Additionally, BNB serves as collateral in many DeFi lending platforms. Borrowers can use their BNB holdings to secure loans, while lenders earn interest by supplying funds. This functionality enhances capital efficiency within the ecosystem.

BNB also plays a governance role in certain projects, allowing holders to vote on protocol updates and decisions. Overall, BNB supports DeFi by enabling transactions, incentivizing participation, and powering a wide range of decentralized financial services.