The package volatile highlights temporarily highlights changes to the buffer associated with certain commands that add blocks of text at once. An example is that if you paste (yank) a block of text, it will be highlighted until you press the next key. This is just a small tweak, but gives a nice bit of visual feedback.
You can install it in the normal way:
;; volatile highlights - temporarily highlight changes from pasting etc (use-package volatile-highlights :config (volatile-highlights-mode t))