FlaskApp is a lightweight web application built using Flask, a micro web framework written in Python. Flask is popular for its simplicity, flexibility, and fine-grained control, making it ideal for both beginners and experienced developers. A FlaskApp typically includes routes (URLs that trigger functions), templates (usually written in HTML with Jinja2 templating), and optionally a database. Developers use FlaskApp structures to build anything from simple websites to complex RESTful APIs. Flask doesn’t enforce a particular project structure or include tools like form validation or authentication out of the box—this gives developers the freedom to use extensions or create their own solutions. It’s well-suited for rapid prototyping and scaling later if needed. FlaskApp is widely used in startups, educational projects, and even production environments due to its readability and ease of deployment. Overall, it strikes a balance between power and minimalism in Python web development.