On top of the definition provided by the other commenter, it’s vaguely analogous to shopping for something, and opening a new tab for everything that looks vaguely good. Then doing a pass to winnow down and close items.
There’s also structure for organizing things that are related. So if you weren’t sure if you wanted a toaster or a toaster oven, you could spatially have two separate groups.
It only clicked for me once I saw someone else use it. I’m used to it just being hostile to search traffic.
Consider a spring loaded drawer divider. Keeping everything from sloshing around can make a surprising amount of space.
My drawer in the image used to be a nightmare. Everything used to move around and it would jam when opening sometimes. Adding dividers got it organized enough to leave a third of it free, which is now the rightmost section that’s filled with tea.
It’s been over a year and I still feel a small sense of joy when I open it sometimes. There’s still messes of junk in the back left and right, but they stay put.