The main advantage is a single UI for all platforms. It is easy to learn for developers having knowledge in object-oriented languages. So the developer can update their profile with multiple platform app developers. Perfect for MVP design.

Initially, flutter was only for cross platform development of mobile apps with great performance. It is built over dart hence people were skeptical about using is since that is a new language and most organizations prefer frameworks over widely used languages like JS. But with the release of flutter 2.0 in May it has added one code support for not just cross platform mobile app development but also website development and cross platform desktop application development. That means it is one code for all platforms. Currenly we have to write 3 different code for desktop, web and mobile apps. Flutter has entirely changed that at its a huge advantage for developers.

I have been using Flutter for every mobile application project I worked on. Since the day I came to know about Flutter, I have always been experimenting and exploring it. Unlike React Native or any other native languages, Flutter is really fast and powerful. As a Google product, what less do you even expect. Recently Flutter launched is another feature of using the same code of mobile application or web too. Now you don't even have to worry about your device being mobile or web or tablet, etc. I am really a big fan of flutter, you can say. Unlike other frameworks, where you have to write different codes for web and mobile apps (for example, ReactJs and React Native), Flutter itself is enough for all teh devices.