How do i undo a remove shortcut

[AC Question]

I have a galaxy s7 samsung phone. I accidentally dragged a shortcut icon..not an ap into the remove icon. I want it back. Cant remember the name of the shortcut either

 

[Rukbat]

Find the app in the app drawer. Long-press it. Drag it to the desktop. (That creates a shortcut to the app on the desktop.)