Page Type targeting is very similar to URL targeting but allows you to show your campaign on a broader set of pages without having to include every one manually. Page types are set by your account manager so if you are missing a specific set, you may need to ask them to add it for you.
Including or excluding Global page types i.e every page where the tag is running on your site, will remove all other page types as these would cause a conflict in the targeting rules if applied.