osc is a powerfull way to interract with norns.
you can see it as midi, except that:
all parameters present in the param menu at a given time are controllable remotely via OSC.
additionally, scripts can be made to listen to OSC events (code snippet).
For more details, read the norns osc documenation.
touchosc is an android/ios/ipados app that allows using your phone/tablet to build OSC control surfaces.
felart/Norns-TouchOSC templates allow controlling global params.
toga and oscgrid (lines thread) expend this further by providing a virtual grid and arc.
a m4l device was made to allow controlling norns global params quickly from ableton.
some script also have accompagnying m4l devices: