#What Are Cross-chain Bridges?
A cross-chain bridge, otherwise known as a blockchain bridge, is a protocol that connects two blockchains, allowing users to transfer digital assets and information from one blockchain to another.
It is more or less a ‘middleman’ that connects different blockchains, facilitating token transfers, smart contracts and data exchange, as well as communication between two independent chains.
For instance, if you have Bitcoin and want to spend it on the Ethereum blockchain, a cross-chain bridge will make this possible, by wrapping BTC.
Blockchain bridges grew in popularity partly due to the rise of “alternative” layer-ones blockchains, such as Solana, Avalanche and BNB Chain. These so-called “Ethereum-killers” attempted to win market share, and users, from the first smart-contract chain. However, many users had funds locked up on Ethereum. Bridges gave them a seamless way to move their assets over to other chains.
In general, having access to multiple blockchains through a single network enhances the experience of users, increases liquidity for DApps and enhances efficiency of assets.