It certainly has an impact on geography on a smaller scale if it is big enough. A moon the size of Mars would create huge tides that would impact the shores all over the planet. Large mudflats that stretch for many kilometers, connect islands to the mainland for a few hours twice per day while flooded during high tides could be very common features on your planet. Coastal cities would have to deal with tides several meters high and build accordingly etc. Of course, the smaller the moon and the further away from the planet it is, the less it impacts your planet.