How Does This Really Work?

How does this thing work? I would love to know. How did you find out how to even do this first of all? What happens is just opening an emulator and fetching some SQL file. And then it outputs all the screenshots into one folder, which is then picked up by this tool to generate the play store screenshots. So basically you get all the screenshots one by one is output into a folder just as a raw screenshot. Then they just look like the other one we've seen before. We're going to look similar to this here. It's also has to do some config, some special config here for everything to work.