End-to-end (e2e) testing is a great way for developers to ensure their software is performing as intended. It is a testing method that verifies the complete flow of an application from start to finish. This means testing the application from the user interface, through the application's API, and into the database. It is especially useful for applications that have multiple components that need to be tested together. e2e testing is a great way to test the entire stack of your application and make sure everything is working properly. With e2e testing, developers can catch bugs quickly and ensure their applications are running as expected. This is a must-have for any software development team looking to ensure the best user experience and reliability.