Use this tag for questions specifically about the Oracle ORDS product. Don't use it for questions about Oracle Application Express, a.k.a APEX, or questions about generic web services communicating with an Oracle database.
Oracle REST Data Services (ORDS) bridges HTTPS and your Oracle Database. As a mid-tier Java application, ORDS provides a Database Management REST API, SQL Developer Web, a PL/SQL Gateway, SODA for REST, and the ability to publish RESTful Web Services for interacting with the data and stored procedures in your Oracle Database. The ORDS documentation may be found here.