@haptic, it's not you. This is a complicated topic, and the wiki was poorly written.
I have revised two related wiki topics, and if you have time, I'd really like to have your feedback on the rewrite. You can get links to the wiki articles, and post your comments, here:
Wiki Update: Web Server and Public Web Trigger
Note these are still a work-in-progress, but I think they are complete enough for a review.
Thanks.