What does insert mean on a computer?

Answer 1

The insert key on the computer allows the user to insert text into the same "cell" or "box" of the text in question.

For example:

I have five letters in five boxes,

a b c d e

The insert key, when my cursor is in front of the 'a' allows me to replace the letter 'a' with any other key on the keyboard. So If I press the letter q, the five letters would look like this:

q b c d e

And if I continue typing it will overwrite the rest of the letters.

q w e r t...

And so on.

Very useful if you're tired of using the backspace key when just changing one letter in a text field.