A legacy applicant has a parent or grandparent that attended the university they are applying to. Most universities limit it to this definition, but some expand it to uncles, aunts, and siblings. The university wants to create legacies so that they can secure support. If you are a legacy, you should definitely fill in the parts where it requests parent’s undergraduate institutions, and when a supplemental application has a question asking about other family members. Not all legacies are admitted to the institution; all other factors are still evaluated. Legacy status can help more if your parents were very involved with their alumni group in supporting your school. Legacy applicants should err on the side of applying early to show your interest in the institution in combination with your history with it.
These are some programs that are popular among high school students. This is by no means an exhaustive list of nationally recognized programs. Boy’s/Girls States