What is this loose piece from my laptop?
A few days ago I heard the noise inside my laptop when I moved it, the noise of a loose piece (I thought it was maybe a screw), but when I opened it, I found this. Any idea what this is and if it's something I should worry about? I included an image next to a pen just so you can see its size. This is a MacBook Pro Mid 2012
MacBook Pro 13″, macOS 10.15