What is the purpose of the `error.js` file in Next.js App Router?

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Grade: Education Subject: Support
What is the purpose of the `error.js` file in Next.js App Router?
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The `error.js` file in Next.js App Router is used to define custom error pages for your application. It allows you to handle errors that occur during rendering and provide user-friendly interfaces instead of the default Next.js error pages. You can customize the UI and response status code for different error scenarios.