Adoption is often praised for its mutual benefit to all involved: the adoptive parents who want children but maybe cannot conceive; the birth mothers who cannot support children but opted against abortion; and the children themselves, who might otherwise grow up in an institution. This is often called "the triad of adoption."
For the typically young birth mother, adoption allows for their continued education, travel or career development. Conversely, for the birth mother who simply does not have the finances or stability in her life and environment to raise a child, adoption offers her peace of mind that the child has gone to people who do.
The process of putting a child up for adoption is also made as easy as possible for the birth mother, with counseling, paid legal and medical expenses, and even the choice of which family the child goes to.
The benefits for the child are a stable, normal upbringing, perhaps with brothers and sisters, by parents who actively and determinedly sought children, as opposed to having them by mistake.
For the adoptive family, the benefits include the typically longed-for and rewarding experience of raising a child. Equally, since the adoptive parents will often develop a relationship with the birth mother ahead of delivery, they will also get to vicariously experience the excitement of pregnancy.