What are some ways my landscaping company might be affecting the health of my lawn?

From the "It's All Relative" SoilKit webinar for homeowners on 2/26/21, George Woerner and Christina Woerner McInnis answer the question “I am here in Oregon in the Valley, and my grass is not doing well. It has moss and dead grass mixed in. I have a lawn service and they mow nearly every week and I was wondering if this would cause any problems or if it’s something else?”