What is the name of the section where the most star are found?

The section where the most stars are found is called the "galactic core" or "nucleus" of a galaxy. In our Milky Way galaxy, this area is densely populated with stars, gas, and dust, and is located in the direction of the constellation Sagittarius. The galactic core also typically contains a supermassive black hole, which contributes to the high density of stars in that region.