Sometimes displayed as Ins, the Insert key is a keyboard key located on most computer keyboards by the backspace key that changes how text is inserted.
For example, if the I-cursor is placed in front of any text, as you type, text is inserted and nothing is overwritten. However, if you press the Insert key and the I-cursor changes to a block cursor, as you type the text is overwritten.
In our example picture on this page you can see the different cursors. In the top example, if we were to type "test " in front of "Computer Hope example" it would become "test Computer Hope example." However, with the bottom example we pressed the Insert key to get the block cursor and change the insert method. If we type "test " with a block cursor it would make the text "test ter Hope example" since the first part of the text would be overwritten.
Tip: Not all programs allow you to change the insert method with the insert key. If the cursor does not change when you press insert it is not supported.