It's a collection of miscellaneous data. Useful trivia you've always wanted to know.
I have ALWAYS wanted to know what those weird little washing symbols on clothing labels meant, or have a map of the Hampton Court maze, or know the layout of an orchestra, or understand glove sizes, or how to tie a bow tie. Those are all things one could google separately. Alternatively, one could buy this amazing AspiePedia. I've had it for years, and every now and then it makes a reappearance. And that's when I walk around saying to everyone: "Did you know.....?"