You can right-click on an appropriate object to select a command, then right-click to execute the command. You can click on an icon to execute some commands.
Some of the keyboard shortcut commands are the same, but most are different. See related links for keyboard shortcuts for MS Word and MS Excel.
Excel is a Microsoft product. It has many commands, such as "Save the File", import, export, copy are all commands.
Commands enable you to use Excel. There are a wide range of commands in Excel. As it is a very powerful application, there are many things you can do with. Some training and experience will help you to learn more about them and what you can do. It is impossible to give full details in an answer like this.
It is a set of related commands that you can have together on the ribbon in Excel.
Menu
You may be referring to functions, of which Excel has many types of.
Most Excel 2007 commands are on the menu ribbon; far too many to list here. See related links for how the Excel 2007 ribbon compares to Excel 2003 commands.The ribbon at the top of Excel 2007 and higher is a list of menu options.
task pane
ribbon commands
A submenu command
microsoft exel
Whatever is the version of your ms excel, there is a button for help that informs you everything about the program. When the help windows open, select the itens you want to save, copy and paste on your notepad for further consults.