$ETH currency of the BNB Chain, previously known as Binance Smart Chain (BSC). It serves as a utility token within the Binance ecosystem. Users can employ BNB for various purposes, including paying transaction fees, participating in governance, and staking. Additionally, BNB provides discounts on trading fees within the Binance Exchange. 

Key features and uses of BNB:

Transaction Fees:

BNB is used to pay for transaction fees on the BNB Chain and within Binance.com. 

Governance:

BNB plays a role in the governance of the BNB Chain, allowing users to participate in decision-making processes. 

Staking:

BNB can be staked on the network to earn rewards and participate in securing the blockchain. 

Utility Token:

BNB offers discounts on trading fees on the Binance Exchange and can be used for various services within the Binance ecosystem, according to Binance. 

Auto-Burn System:

BNB employs an Auto-Burn system that reduces the total supply of BNB based on market conditions and transaction volume on the BNB Smart Chain, according to Binance.