Horizontal ruler
ribbons
It's the ribbon.
a window
vertical ruler
When you place the mouse pointer over a button or other element in a Word program window, a small box may appear near the pointer that displays a description of what the button or element does. This is called a tooltip, and it provides information to help users understand the function of that particular element.
Insertion Point
is a program that displays an online advertisement in a banner or pop-up window on Web pages, e-mail, or other internet services.
tabs
The title bar of a program's window typically displays the program name along with the name of the currently open document. It is located at the top of the window and provides users with essential information about the active application and its contents. Additionally, some operating systems may show this information in the taskbar for easy reference.
The split feature can be used to show different panes in the window, enabling you to see different parts of the document.
The bar at the top of a program window that displays the current file or program is called the "title bar." It typically shows the name of the file being edited or the application's name. In many operating systems, the title bar also includes minimize, maximize, and close buttons for managing the window. Additionally, it may provide information about the program's status or other relevant details.
It defaults to Sheet1 in the open workbook which is Book1.