the documentation page on this concept is very nice, although i would have to tinker with it in person to understand what the full benefits are.

with SpatialOS, the concept of a schema defining the structure of objects synced over the network was introduced very early. it seems to be similar with coherence, with an exception: coherence generates the schemas on its own. it actually has two strategies of doing so, and the docs list the pros and cons of both. this is because unlike SpatialOS, where the schemas were just written like an C# class and intellisense helped fill out the properties, coherence's SDK has editor tools built right into Unity where you can just click the synced properties. as long as configure this responsibly, and remember to bake schemas, the process is way more convenient.