what is the definition of status bar?

Answer 1

A status bar is a component (widget) often found at the bottom of windows in a graphical user interface. It is very frequently divided into sections, each of which shows different information. Its job is primarily to display information about the current state of its window, although some status bars have extra functionality. For example, many web browsers have clickable sections that pop up a display of security or privacy information.

A status bar can also be text-based, primarily in console-based applications, in which case it is usually the last row in an 80x25 text mode configuration, leaving the top 24 rows for application data. Usually, the status bar—often called a status line in this context—displays the current state of the application, and helpful keyboard shortcuts.