Not sure whether I even have ARD - Should I apply the patch?

This is a very novice question so apologies in advance. Apple software update has been advising me to apply an update for this for some time, but I am not sure what this is. I don't think I ever used Apple Remote Desktop to need applying an update, and I am concerned that by updating this, it will activate a functionality which I never consciously used.

Rather than to heed the "don't argue, just update everything Apple tells you to" approach, I thought to ask for an advice before proceeding. I am afraid I am a novice user of OS/X and therefore my usage is fairly primitive. I do not access my Mac remotely nor wish for anyone else to start accessing it remotely.

Any advice would be appreciated.