SAP Web IDE is no longer available via SAP Business Technology Platform trial accounts. Any references to SAP Web IDE in this documentation are only relevant for you if you have access to SAP Web IDE through a productive SAP BTP account. Please consider SAP Business Application Studio as an alternative. See App Development Using SAP Business Application Studio.
Key use cases:
Develop new SAP Fiori apps and SAPUI5 apps
Extend SAP Fiori apps
Develop SAPUI5 mobile hybrid apps (HAT plug-in)
Extend SAP Web IDE with new plug-ins and templates
For more information about SAP Web IDE, see the documentation for SAP Web IDE on the SAP Help Portal at https://help.sap.com/viewer/p/SAP_Web_IDE.