Well, its a fancier API tool, which smooths out the flow between Backend and API consumers better (at a cost).
At its core, it is a project based around a _consumer facing schema_, that can be queried. You put in upfront and ongoing be work to give product/frontend/clients the ability to discuss data requirements around a first-class schema, and then once the resolvers are written, allow them to explore/experiment with the data, in queries that can be used directly in production.
From what I have seen, the first (only?) ones to feel the pain it solves for are Product/Frontend/Clients.
Hopefully that ^ waves away some of the haze