The formula bar.
scroll bar
It is called the slider or scroll bar and if you click and move the slider up or down the partially visible contents of the window scroll up or down
scroll bar
area near the top of the worksheet window that displays the contents of the active cell
The Formula Bar.
Status bar
Status Bar
You may be referring the formula bar. It displays the cells contents, which can be values or formulas.
formula barformula bar!
search options
If you are referring to the title at the top of the window it is called a "Title Bar"
what part of the window shows the name you opened