Use the Excel new workbook or Excel new worksheet feature to create new files, insert and delete text, and navigate an Excel worksheet.
Every workbook created in Excel must be saved and assigned a name to distinguish it from other workbooks. The first time you save a workbook, Excel will prompt you to assign a name through the Save As operation. Once assigned a name, any additional changes made to the text, numbers, or formulas must be saved using the Save operation.
If you're saving the file for the first time and you do not choose a file name, Microsoft Excel will assign a file name for you.
It's a good idea to save frequently when working in a spreadsheet. Losing information is never fun! You can quickly save your spreadsheet by using the quick-key combination Ctrl + S.