Shot placement is arguably the most important component of field marksmanship, right after having the experience to know when a given shot opportunity is high percentage for you.

Two articles you must review before getting ready for fall hunting season:

https://www.grandviewoutdoors.com/big-game-hunting/whitetail-deer/where-to-shoot-a-deer

https://blog.1800gunsandammo.com/target-angle-for-hunters/