Check box and uncheck

What is a check box?
Checking and unchecking a box?

Check box, as the name implies, is a control to represent the on or off state of a particular command or function. It is similar to a ON-OFF button with the check state representing the working of a command and the uncheck state the non-working of a command.

Check state is represented by

Uncheck state is represented by

So checking a box means turning ON a function and
unchecking a box means turning OFF a function.

Note:
This is a common control and its use is almost identical in all applications