Embedded binaries are binary files that are copied to your application bundle when you build the project. Use embedded binaries when your application relies on third-party frameworks so people can use your application without needing those frameworks installed on their machine. Embedded binaries keep users from having to manually install third-party frameworks. Your application uses the framework you embedded.
In your Alamofire example your application relies on Alamofire. If you didn't embed the Alamofire framework, nobody would be able to use your application unless they installed Alamofire manually. By embedding Alamofire with your application everyone can run your application.
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