The Angular CLI (Angular CLI) is an official Angular project to ensure that newly created Angular applications have a uniform architecture, following the best practices perfected by the community over time. This means that any Angular application you encounter going forward should have the same general shape. Angular CLI goes beyond initial code generation. You will be using it frequently to create new components, directives, pipes, services, modules, and more. Angular CLI will also help you during development with live-reloading features so that you can quickly see the results of your changes. Angular CLI can also test, lint, and build optimized versions of your code for a production release. Furthermore, as new Angular versions are released, Angular CLI will help you upgrade your code, by automatically rewriting portions of it so that it remains compatible with potential breaking changes.