Surface provides custom Lightning components (SAP Sales Doc Search, SAP Customer Detail, SAP Inventory Search, etc.) that display various information for sales orders, quotes, customers, inventory, etc. Use Salesforce's Flow Builder or Lightning App Builder to place one or more of these custom components on a page (example: the Account Detail page), then select the fields that you want to display within the component. You can display or hide any of the component's fields, so you can customize the contents of each component to fit your needs.
Learn more about how to use Surface components in Flows and FlexiPages