What is Cross-Chain Communication?

Cross-chain communication is a process that allows for communication between different blockchain networks by enabling mutual interaction and value exchange — for example, in the form of token exchange and the sharing of multiple data types. Cross-chain communication is central to the concept of blockchain interoperability. There are many inefficiencies related to cross-chain communication, but as blockchain technology continues to advance, many experts predict that it will become increasingly more efficient to exchange data in more ways, such that one day full data sharing capabilities between hundreds or even thousands of networks may be possible.