React Server Components allow the developer to mix the fast server-side rendering with the interactivity of client-side JavaScript. 

So far modern JS frameworks were explicitly operating on the client (with SSR being an optional feature). With server-components it's the opposite - RS Cs introduce a new mental model for building hybrid applications that leverage both the server and the client.

The main advantages of the React Server Components are that:

• Initial page load is faster;
• You can move the data fetching to the server;
• You can keep the large dependencies on the server;
• The client-side JavaScript bundle size is reduced;