Courses that are set to Windowed will be deployed via a pop-up window.
Courses set to Embedded will deploy in the same window as the LMS.
Courses set to the Windowed option could be challenged with browser pop-up blockers and could experience issues when being viewed on mobile devices.
Courses set with the Embedded option will help keep the LMS window active when viewing on a mobile device and will by pass browser level pop-up blockers.