Oracle APEX (Application Express) is a low-code development platform that allows users to create web applications quickly and efficiently. It is designed to help developers build applications with minimal coding, using a visual interface and pre-built components. This makes it accessible for both experienced developers and those with limited programming knowledge. APEX runs on the Oracle Database, leveraging its capabilities to manage data and perform complex queries. Applications built with APEX can be deployed on-premises or in the cloud, providing flexibility for businesses. Its features include responsive design, security, and integration with other Oracle products, enhancing overall functionality.