An in-person course is one where the course is face-to-face on a campus site with your instructor at a particular time. Then there is the typical homework and studying as well.
In a face-to-face class you would have homework outside of class that in some cases would be completed online.
As a student, you can expect that a portion of your instruction and assignments will be presented in an assigned classroom.
All types of classes should be equal in rigor and time commitment.