Delete Key
The Delete ⌦ key, often labeled as Del, and placed around the Home End key cluster.

Usually it is used to delete character to the right (aka forward delete) in text editors or word processor, or used to delete a file.
Use of forward delete key

https://twitter.com/ErgoEmacs/status/1262082788741664770
Del vs Esc
which key do you use more often? escape or DEL (forward delete)?

https://twitter.com/ErgoEmacs/status/1261807511801225216