Sap Hana is an in-memory database platform developed by SAP that combines database, application processing, and integration services. It allows for both high transaction rates and complex query processing on the same platform. Sap Hana Online training provides certification training covering topics such as the Hana architecture, data modeling, security, reporting, and data provisioning to help aspirants learn and work with the Sap Hana platform. The training includes materials like videos, documentation, and access to the Hana platform.