What network is Harmony One on?

Could you elaborate on the network that Harmony One operates on? I'm curious to understand the underlying infrastructure that supports this cryptocurrency and its functionalities. Specifically, is it built on a public blockchain, a private blockchain, or a hybrid model? Additionally, what are the key features and advantages of this network that Harmony One leverages to provide its users with a unique experience? Clarifying this aspect would greatly aid in understanding the ecosystem and positioning of Harmony One within the broader cryptocurrency landscape.