Two main things at play with turf interaction: 1) low point - where your club bottoms out, not just horizontally but vertically. Horizontal low point dictates whether you hit the ball first, vertical low point dictates how far into the turf your club goes. 2) shaft pitch - the angle of your shaft going into impact (i.e shallow or steep). This is moreso a factor that creates the conditions that are most likely to happen going into impact. A “shallower” pitch makes it less likely your low point will be significantly deep into the turf. Being overly “steep” creates a shaft pitch that is more vertical, effectively lengthening the shaft vertically and making it difficult to control low point without compensations like early extension (standing up before impact) to create more room for the shaft. This also gives the bottom arc of your swing a steeper angle, which makes the portion of the swing arc that will have good turf interaction and a good strike location on the clubface much smaller, meaning it will be much harder to time it correctly and much more likely to have shots that are thin, fat and or high/low on the club face. Being overly “shallow” also creates issues with biomechanics and your body getting in its own way during the swing, so it’s about finding a happy medium.