Then, if necessary:
The long version:
Terminal emulation lets you use your PC to make a connection to another computer and interact with it as if your PC were a terminal, even though your PC is not really a terminal and almost certainly does not have the same kind of keyboard as the terminal it is emulating.
One of the most confusing aspects of terminal emulation is making the PC keys do what their keytops say they do. Many people find it quite surprising when the Backspace key doesn't backspace, the Arrow keys don't move the cursor, the Insert key doesn't insert, and so on. In general only the letter and digit keys on the main keypad can be depended upon to act as their labels suggest. The rest, well... each has its own story. This is the story of the Backspace key.
First some terminology. "Backspace" might (or might not) be the name of a key. For example, it is printed on the keytop of the large key at the upper right of main keypad on the PC 101 keyboard. On the DEC keyboard, the same key is labeled with a symbol (<X]) instead of a word. "Backspace" is also is the name of an ASCII control character (ASCII value 8), which might or might not be associated with the Backspace key. "Backspace" is also an abstract concept relating to computers, terminals, and typewriters, having at least two distinct meanings:
To confuse matters even further, your keyboard might have keys other than Backspace that suggest a destructive backspace capability. For example, PC keyboads include both a "Del" and "Delete" key and one or two Left Arrow keys in addition to the Backspace key. These are strictly for local PC functions and not, in general, for sending characters to the host (but of course in Kermit you can map them to do whatever you want).
To cause a destructive backsp