Static body won’t ever be affected by collisions with other bodies (but they will).
Note that this doesn’t mean that static body cannot be moved. It simply means that it’s only
controlled by the script (via position, velocity etc) but it’s a “stone wall” with infinite
mass when it comes to collisions.
This is useful both for objects like walls (which are truly static & in whose case velocity
will be null forever) and for player or script controlled objects (whose position or velocity
may change over time & which shouldn’t be affected by physics).