What does north latitude 18 degrees mean?

The maritime climate is very humid. According to the weather network, the north latitude 18 degree line passes through world-famous tourist resorts such as Hawaii, Maldives and Bali, so it is called the golden latitude, which means that the marine climate is highly humid. Latitude measured from the equatorial plane of the earth to the north, a kind of latitude on the earth, refers to the latitude of a point on the ground on the ellipsoid, that is, the angle between the normal of the ellipsoid passing through the point and the equatorial plane of the earth.