The provided code demonstrates how to display an ALV (ABAP List Viewer) using a custom container in an SAP program. It defines data structures for the EKKO table, sets up a custom container and ALV grid, and populates a dropdown list in one of the columns. Key steps include creating the custom container, defining the field catalog with the dropdown handle, filling the dropdown values, and finally displaying the ALV grid on a screen with the dropdown enabled in the specified column.