Only recently has the technology needed to freeze eggs (as opposed to embryos) improved to make this a viable option. It may be a reasonable option for many women but it is not a good option for every woman. It is usually preferable to freeze embryos rather than eggs if that option exists.
Women may choose to freeze their eggs for a variety of reasons. These may include a plan to delay childbearing for personal reasons, no current partner, and fertility preservation in anticipation of medical treatment such as chemotherapy or radiation. When considering this option, it is important to understand that the best future chance of pregnancy with frozen eggs results when you freeze your eggs at an earlier age.