Ok, this might seem like a stupid question but I have always seen these things and don't actually know what they are for.
I might need this and actually not knowing that I do since always came across it being mentioned but haven't actually read or asked anyone how/what its used for.
If there are more out there like me who would get educated on this, for all you know, us people would be grabbing this after finding out we actually have a need for it.
This actually might be the wrong thread for asking this but I have to give it a shot. Sorry..