With U6-U12 the parents also play a big role in the soccer life of your players. This role is not always positive, for example when we think of the coaching at the field, or the way parents want their kids to play soccer.
Good communication can enhance the commitment of the parents.
Also during the season communication remains important. You might want to make new appointments or programs. At the end of the season you can arrange an evaluation meeting, for example at the last match or tournament. You can leave some of these things to U16-18 players, but younger players mostly can't do these things. Now the parents play an important role, if you don't want to do it all yourself.