The "env" file in Laravel is a central configuration file that allows developers to define and manage environment-specific settings for their applications. It provides flexibility and adaptability to your Laravel project across different environments, like local development, staging, and production. You can store sensitive information like database credentials, API keys, and other settings in an "env" file. You can access these variables using the env helper or the Config facade.

Simply put, the "env" file in Laravel provides a flexible and secure method to manage environment-specific configurations by defining variables. Moreover, configuration enhances your application's security and promotes collaboration among team members by providing a centralized location to manage and share configuration settings.

BY Best Interview Question ON 20 Jun 2023