What is a hairline??

I have never heard the word "hairline" before.

I've seen people around me who have had hair transplants.

At first after the transplant, I felt sorry.

I also feel reluctant to go out, so I wear a hat and work.

Hair transplantation is okay because the hair grows back later.

When someone is 고민하는 탈모, I also want to 추천 hair transplant.

Does the hairline create a beautiful line?