What is the use case of OMNI network?

As a financial professional with an interest in cryptocurrencies, I'm curious to know the specific use case of the OMNI network. Could you elaborate on how it functions and what problems it aims to solve? From what I understand, it's a protocol that enables the issuance of digital assets on top of existing blockchains. However, I'd like to gain a deeper understanding of its practical applications and the value it brings to the cryptocurrency ecosystem. Could you provide some real-world examples of how the OMNI network is being utilized?