Popping goes way back when detectors didn't have the pinpointing capabilities that most units have today. Just get out and work with it for a period of time.
I also dealt with those people that said "Yes, as long as you don't dig any holes" I showed them what i used ( a long, thin screwdriver with the blade rounded over and smoothed) and how I used it. They had no problem with me detecting as long as I did it that way. In some places, your targets are between the surface and an inch under. Parks and playgrounds where fresh coin spills are the norm are perfect for popping, and in most cases, digging holes could just be a waste of your precious time.
I like digging deep plugs approx. 5" dia. where I am allowed. I like to start the hole with a ginsu steak knife, as it does minimal damage to the edges of the plug and the hole, and goes through roots like butter. The soil should be moist or wet. I don't like to dig plugs at all when the ground is dry. I use a gator digger in rougher ground, and a small round pointed garden shovel(5" wide blade with 3' handle) in the woods .