I am a chiropractor who provides patients with chiropractic care.
This includes checking their spine to see if it's misaligned and correcting the misalignment.
As far as target audience, from my perspective, it's everyone. There is nobody today who hasn't gone through some sort of physical trauma, fall, or car accident. People who have headaches, are in pain, or are interested in improving their own health are the most likely to come in to see me.
Most people can use the help to improve their posture, diet, sleep, exercise regimen, and ability to deal with stress - and I help them with that, too if needed.
I focus mainly on the top of the neck and I have attached an optional picture of the top neck bone if you care to use it.