It has many useful facilities on it. They help make working with Excel easier and more productive. You have facilities such as the spell checker on it. There is a thesaurus too, to get alternatives to some words used. You can add comments to cells. If there is collaborative work on the workbook, the track changes facility is there enable users to see what changes have been made. One other major aspect is the facility to apply protection to a worksheet.
Spell check is on the Review tab, in the Proofing section, for Excel 2007.
active tab
Home Tab
in the home tab
It is on the Page Layout tab.
Review Tab
the Home Tab
On old versions, it is on the Tools menu. Click the option there. On newer versions of Excel it is on the Review tab. In both instances documents need to be shared.
Home tab
Sheet tab
At the bottom of the screen.
If you save it when the first tab is open, then it will reopen on the first tab.