As things catch my eye, I want a place to put them so I can go back to them as time permits. I am a bit of a fad and fashion person, things grab attention and I have a few moments' enthusiasm for them, want to pursue them fervently ... then work and other mundanity get in the way. So as I read, hear or otherwise stumble across things - this is where I will store them, for later consideration. Or not, as I move onto the next thing. Or the next!
