Hi, you're right, I should have explained a bit more!
Basically, project management. Making sure everyone has the info they need so no one needs to redo stuff because of miscommunication, running after people to get their assets/make sure the project is on track, organising team calls, ... Of course, they'd also be welcome to pitch in on creative aspects if they want :)
In jams it's not often a separate role, either the designer or the programmer usually ends up doing those tasks unofficially, but I found that the experience is smoother for everyone involved with a dedicated project manager ;)
If you're interested, you can answer here or add me on discord ( LaChapeliere (elle/she)#6674 ) :)