Lightweight: Flask is a lightweight framework that doesn't take up much space. As functionality is limited, developers select only those they really need. Extensions: just because Flask is micro doesn't mean it's limited. In fact, the framework offers a multitude of functionalities, enabling developers to design a large number of applications. Web app customization: with its few default features, Flask makes very few decisions.
It's up to the developer to choose the extensions and make the necessary modifications. This makes it possible to create a perfectly tailored application.