1. Alternatively referred to as a return key, when referring to a keyboard, the enter key is used to send the cursor to the next line or execute a command or operation. It is common for most standard keyboards to have two enter or return keys: one above the right Shift key and another on the bottom right of the numeric keypad.
Where is the Enter key on the keyboard?
Below is an overview of a computer keyboard with the Enter keys highlighted in blue on the main keyboard as well as the numeric keypad.
Note: Apple computer keyboards have a "Return" and "Enter" key and not two Enter keys.
2. In general, enter or entering refers to when data is being placed into the computer. For example, when searching for something in a search engine like Google, you are entering a query or set of words to find more information.