Explain what server-side rendering is and its advantages.

Server-Side Rendering (SSR) is the process of generating HTML pages on the server rather than in the user's browser. With SSR, the server creates the complete HTML markup and sends it to the client, which immediately sees the page content.

Advantages of server-side rendering:

• Fast initial load: The user receives a ready-made page immediately, without waiting for JavaScript to load and execute.
• Better SEO: Search engines receive the full HTML, improving indexing.
• Support for older devices: Does not require a powerful client for rendering.
• Enhanced user experience: Less flickering and empty screens during loading.

Example: A React application with SSR is first rendered on the server using ReactDOMServer.renderToString(), and then sent to the client.