What are Boarding Groups Lufthansa?
Lufthansa's boarding process is organized to make boarding quick and efficient. Each boarding pass has the passenger’s group number. The Lufthansa Boarding Groups start with pre-boarding for families, unaccompanied minors, and passengers needing assistance. Priority boarding follows with Group 1 (First Class members) and Group 2 (Business Class and Star Alliance Gold members). The remaining groups are called based on seating - starting with window seats, followed by middle and aisle seats.
Read more: https://www.airlinesgrouptravel.com/blog/how-does-lufthansa-boarding-groups-work