Please explain hybrid seating again?

Hybrid seating is where some sections are reserved (patrons select a specific row and seat number), and other sections are general admission (open seating). For example, you may want the whole theater to be general admission since you rarely sell out, but want a few rows in the front reserved for your loyal patrons who want an actual seat. Or, you always sell out in a reserved scenario, but want a General Admission student only section, so they can sit with their friends without preplanning.