Blockchain interoperability means that without a need of intermediaries it is able to share data across different networks. At the moment blockchains work independently from one another and there is no direct communication between them.
Interoperability enables data sharing between different blockchains. For example, if someone wants to trade Bitcoin for Ethereum they have to use a centralized authority which increases risk factor. With interoperability these transactions can happen directly from wallet to wallet.
Libonomy’s interaction channel will include layering between other public blockchains. This will enable Libonomy to be the first truly interoperable blockchain.