TYPO3 is an open-source content management system (CMS) that allows users to create and manage websites easily. It is particularly popular among businesses and organizations for its flexibility and scalability, enabling users to build everything from simple blogs to complex enterprise websites. Developed in Germany, TYPO3 offers a wide range of features, including multilingual support, user management, and extensive customization options through extensions. Its active community contributes to regular updates and improvements, making it a reliable choice for web development projects.