Angular routing allows users to navigate between different views without requiring a full page reload, resulting in improved user experience and application performance. Routing in Angular involves key components such as the RouterModule, Routes, Router Outlet, and Router Link. By setting up routing in an Angular application, developers can configure routes using the `@NgModule` decorator or the `forRoot` method.

Validating and storing uploaded files securely is crucial to prevent security vulnerabilities in web applications. This guide covers best practices for validating file types and sizes, and storing files securely using Yii's built-in file handling features, ensuring a secure and protected application.