In-video (instream video) ads are the ads that appear within the video content in a video player. These video ads can appear at the beginning (pre-roll), in the middle (mid-roll), or at the end (post-roll) of the video content, the user intends to watch. AdSpyglass works with pre-roll ads at the moment. In-video ads are the most widespread video ad format.
Orphan Page
An orphan page is a page that is not linked to any section of your site so that users cannot find it on your site.