Haha, yeah I'm having a hard time grasping it. Is there a similar tool for other types of data that you can show?
Probably! But not that I'm personally familiar with.
I'd liken it to a copy of Excel online. But not really; it's not a spreadsheet.
You go to it, and create a database. You call it "My minis collection" or "3E Spell Compendium" or something.
You then decide that each entry in your minis collection needs a photo, a name, measurements, and whether it's plastic or metal. So you define what an entry looks like.
You then proceed to add your minis. You have lots, so you give your friends access to help you add them. Eventually you decide to just make it a big minis database and change the settings to let anybody add a mini.
Now, while you were doing that, I was creating my starships emporium. It's set up differently to your minis collection. Each entry had a ship class, description, hull size, phaser banks, and a shield rating.
So someone's looking for a mini. They come to your minis database which now has a million minis in it. They filter it by dragons, large, plastic, and get a list if suitable candidates. They don't want evil dragons, so they filter by dragons, large, plastic, not evil. They get a shorter list.
So it's a simple database tool where you create and define your databases. As a publisher, you might even choose to put closed content in it and charge for a year's access or something., allowing you to distribute content in a format like WotC's DDI Compendium. Though I'd think that paid databases would be few and far between .
Does that make more sense?