Introduction
When you import data into Excel, you can choose to load it directly into a worksheet or into the data model. Loading to a worksheet shows the data as a table you can see and edit. Loading to the data model stores the data behind the scenes for advanced analysis without cluttering your sheet.
When you want to see and work with imported data directly in your Excel sheet.
When you plan to create PivotTables or reports using multiple tables without showing all data on sheets.
When your data is large and you want to keep your worksheet clean and fast.
When you want to combine data from different sources using relationships in Excel.
When you want to use Power Pivot features for advanced data analysis.