An external adaptor allows communication between different blockchain networks or between a blockchain and off-chain systems. It serves as a bridge, enabling the transfer of data or value across incompatible systems.This concept facilitates interoperability, which is crucial as many blockchains have unique protocols and uses. For instance, a decentralized application on one blockchain may need to interact with data from another chain or a traditional database. An external adaptor ensures these interactions can happen seamlessly.These adaptors can also enhance functionality by enabling functions like token swaps, data sharing, or execution of smart contracts across different networks. In doing so, they contribute to the overall growth and flexibility of blockchain applications. By using external adaptors, developers can create more complex solutions, making it easier to build innovations that tap into various blockchain ecosystems while maintaining efficiency and security.