The popular advantages of Flutter framework are as follows:

Cross-platform Development: This feature allows Flutter to write the code once, maintain, and can run on different platforms. It saves the time, effort, and money of the developers.
Faster Development: The performance of the Flutter application is fast. Flutter compiles the application by using the arm C/C++ library that makes it closer to machine code and gives the app a better native performance.
Good Community: Flutter has good community support where the developers can ask the issues and get the result quickly.
Live and Hot Reloading: It makes the app development process extremely fast. This feature allows us to change or update the code are reflected as soon as the alterations are made.
Minimal code: Flutter app is developed by Dart programming language, which uses JIT and AOT compilation to improve the overall start-up time, functioning and accelerates the performance. JIT enhances the development system and refreshes the UI without putting extra effort into building a new one.
UI Focused: It has an excellent user interface because it uses a design-centric widget, high-development tools, advanced APIs, and many more features.
Documentation: Flutter has very good documentation support. It is organized and more informative. We can get everything that we want to be written in one place.