Google, Natural Point of Aim. Once i learned about it from an appleseed class i took, my shooting improved exponentially. A quick way to check your NPOA is to close your eyes and when you open them, that’s where your bullet should be landing, assuming you apply the other fundamentals as well. Don’t use your muscles to force your sights on target, adjust your position so your body lands on it naturally instead. Also, shoot at the bottom of your breath, oxygen in your lungs will make your shot unstable. Plus it’s just adds to a more consistent practice overall.
keep this chart handy too