01One stack, full product ownership
The MERN stack — MongoDB, Express, React and Node.js — uses a single language, JavaScript, at every layer of an application. That means one developer can understand the whole product: the database, the API and the interface people actually use.
For people starting a development career, or founders who want to build their own product, that full ownership is powerful. You are never waiting on a different team to explain your own stack.

