Yes, exactly. It's for people designing custom PCBs. That includes people who have something prototyped on a Raspberry Pi/Arduino, etc. and want to migrate to a custom board that's ready for production (ie. to get cost, form factor down).
Interesting. Is there a guide for someone who's not a PCB designer to get his raspi project as a custom board ?
I want to make a raspi remote controller that controls IR devices around my house via a web app. This would be a perfect, but I have no idea how to get it into a PCB design.