Blockchain interoperability refers to the ability of different blockchain networks to communicate and share data with one another. This capability allows users to transfer assets and information across various platforms, enhancing the overall functionality and usability of blockchain technology. Achieving interoperability can help solve issues like fragmentation in the cryptocurrency space, where multiple blockchains operate independently. By enabling seamless interactions, interoperability can foster innovation, improve efficiency, and create a more connected ecosystem for decentralized applications and services.