Select Members of Group 33

Selects all of the tracks (channels) in group 33. Useful for focusing on a smaller number of tracks. I can visualize a need for lots of groups when working on a soundtrack or a score.

Overview of groups in Logic Pro — Apple Support

Prior to mixing, you may find it useful to define some logical channel strip groups. You could, for example, group all drum channel strips under one drum group. This would allow you to control the group meters (volume, pan, mute, solo, sends, and so on) using a single control, while still maintaining the relative parameter values of each channel strip.