It references your age and potential fecundity. A suntan is today considered beautiful by many people, perhaps because it is exotic and it references leisure activity and outdoor health. Yet suntan beauty is losing its appeal because of the cancer health risks. At the turn of the century a white skin was also very important for women because, I think, it signified not having to work outdoors, being of delicate society. It had high status.
Inner beauty is the second element worth considering.
Some people have something coming from inside them that is captivating and makes them especially attractive. Some of this attractiveness appeals universally while other aspects only appeal to specific other individuals. A person who radiates friendliness or confidence seems to have an inner beauty that appeals universally. Often this type of beauty is not internally generated but rather interactive. This is why I think so many pictures of women show them smiling with teeth exposed.