Before you open Prod, the streaming-vessel that MM uses, you open a song that you remixed together. (From the two deltarune chapter 3 songs previewed on its birthday)
While listening to it, you open Oggle
As mentioned before, Oggle is the generic search engine that is runned entirely by WDG.
It seems like everything you use is made by WDG. The IV, this computer, most of the apps (except fruityloops, that's the music thing), and you suppose the videogames you play are at least published by WDG. Scratch that, I take that back, the Toby Fox games weren't published by WDG, and most other indie games, but WDG is quite the huge company.