This question is a regular feature in Flutter interview, be ready to tackle it.   The pubspec.yaml file, also known as 'pubspec', is included when we create a Flutter project and located at the top of the project tree. This file contains information about the dependencies like packages and their versions, fonts, etc., that a project requires. It makes sure that the next time when we build the project, we will get the same package version. Additionally, we can set constraints for the application.   During working with the Flutter project or collaborating on a project, this configuration file of the project will be required a lot. This specification is written in YAML, which can be read by humans.   The following are included in this file:   General project settings, like name of the project, version, description, etc.   Dependencies within a project.   The assets of the project (e.g., images, audio, etc.).