@thaisalem225,
Ok, it's a phrase, the opposite would be a woman "playing hard to get." As in they will not just have sex with a man unless they do something to earn the right to have sex with them. Some cultures that could be killing someone from another tribe, or it could be dinner and a movie. Cultures have different norms for how sexual women are. The reason for that is the responsibility of bearing children. Women have to deal with the results of sex, which could be pregnancy which leads to children, which leads to lots of responsibility.
Many cultures now have birth control measures which reduce the risks of child birth and as a result, in some cultures, women no longer require as much effort on a man to have sex because the risk of pregnancy is no longer as much of a problem. Women enjoy sex too.
So, some women are seen as "easy" in that they will have sex with multiple partners for little reason, or "Hard to get" which means they have higher standards for whom they will have sex with.
The second part is simply becoming what some women wants. All women do not want the same thing in a man. Some women like big, muscular men, some women like fat wealthy men, some women like other women.
I find it's best to be yourself and find a woman that likes that.