Windows Keys

A few years ago, they started adding those two special Windows keys on keyboards, one to bring up the start menu, and one to bring up the context menu. I just noticed that I even have them on my laptop, where I would think space would be at a premium and they would forego useles, unnecessary keys. So I'm wondering, does anyone actually use these keys? I'm usually someone that likes to use alloptions available to me, I like to customize my desktop and mouse buttons and things like that, but I have never, ever used either one of these keys.