Yes, for a second, I was very confused about the connection between active directory and advertising.
Related question: Does anyone have a great introductory book or series on Windows AD? I haven't ever used it at work, but I've had a lingering sense that it would be really useful and helpful for a bunch of IT problems. The documentation/intro to that world tends to assume you already know quite a bit about AD and how it works/functions.
This is a good start. Looking forward to having enough functionality to actually use it in production.