The primary benefit of Server-Side Rendering (SSR) in web applications is improved search engine optimization (SEO). SSR allows search engines to crawl and index the content of your web pages more effectively, leading to better visibility in search results. While other benefits like faster client-side rendering and enhanced security are important, they are not the primary focus of SSR.

React abstracts away the browser's native event system with its own system called the "Synthetic Event System." This system provides a cross-browser-compatible and efficient way to handle events. Understanding this is crucial when working with React's event handling mechanisms.

When integrating traditional mutable methods with immutable state handling libraries, a potential pitfall is encountering unexpected side effects due to mutations on immutable data. Immutable data is meant to remain unaltered, and mixing mutable operations can lead to unexpected behavior and bugs. Developers should be cautious and ensure consistency when working with immutable data structures.

When an error is caught by an error boundary in React, the method used to render a fallback UI is componentDidCatch(). This lifecycle method allows you to specify how to render a UI when an error is encountered within the component tree. The other options are not standard methods for handling errors in error boundaries.

In Jest, to create a mock function, you use the jest.fn() function, which is typically referred to as mockFunction. This function is used to create a mock version of a JavaScript function, allowing you to control its behavior for testing purposes. It's a fundamental part of unit testing with Jest.

Code splitting with React Suspense and React.lazy() is a technique that allows you to split your code into smaller chunks and load only the components needed for the current view. This helps reduce initial load times and improves performance. Minification and gzip compression optimize code size but don't address dynamic loading. Pre-rendering on the server-side enhances SEO and initial load, but it doesn't load code dynamically. A CDN helps with delivery but doesn't handle dynamic loading.

One of the common challenges when building cross-platform apps with React Native is dealing with platform-specific bugs and inconsistencies. Since React Native aims to provide a consistent experience across platforms, it can be challenging to address the nuances and differences in behavior that exist between iOS and Android. Developers often need to write platform-specific code or apply workarounds to address these issues.

Immer leverages the concept of Proxy Objects to enable developers to write code that appears to modify the original state while creating an immutable copy in the background. This simplifies the process of managing state immutability in applications, particularly when working with complex state structures.

To implement code-splitting in React, you would use the "import()" function along with dynamic imports. This allows you to load specific components or modules only when they are needed, reducing the initial bundle size and improving application performance. The other options ("require()", "load()", "split()") are not used for code-splitting in React.

In Next.js, the component used to link between pages is called "Link." It is an essential part of client-side navigation in Next.js applications, providing a way to navigate between different pages while preserving the benefits of single-page applications (SPAs).