Bubble's core features include:
1. Drag-and-drop interface: Easily design and arrange elements on the canvas.
2. Visual workflows: Create complex workflows by connecting different actions visually.
3. Responsive design: Build applications that adapt to different screen sizes automatically.
4. Database integration: Connect your app to external databases or use Bubble's built-in database.
5. Plugin marketplace: Extend your app's functionality with a wide range of plugins developed by the Bubble community.