As the name suggests it’s a bridge between two Blockchains. Binance Bridge aims to enhance the interoperability between different blockchains. This can be done by converting your crypto assets into a wrapped token that is compatible with Binance Chain and Binance Smart Chain. Currently, it supports the cross-chain transfers for ERC-20, which is a well-known standard for Ethereum Network, and TRC-20 which is a similar protocol for the TRON network.  BEP-2 is the token standard for Binance Chain and BEP-20 is the standard protocol for Binance Smart Chain Network. Note: BNB is the native currency for both chains. You need to have some BNB available in your account to make any transaction on the Binance Chain and Binance Smart Chain network in order to pay the gas fee or network fee. You can access the Binance Bridge Portal from here.