Undo. Redo. These two actions are forever intertwined, but they are missing from the standard Android keyboard. Delete a word by mistake, and there is no Ctrl + Z to undo this mistake. But there is finally a solution for Samsung Galaxy phones.
If you accidentally delete something you wrote, you can use a gesture to quickly restore the deleted words. While this is not an exact copy of Undo and redo the feature on your computer, it is the closest you will come to besides taking advantage of the Enter Plus app or investing in a Bluetooth keyboard.