Benefits of Postgraduate (PG) year

I am considering doing a Pg year. I want this forum to be about any benefits that you or your child has received from doing a pg year. I am purposely not giving any info on myself because I want this to be very general so feel free to share your personal PG story.

At DS school most PGs are there for sports. I do know a neighbor who was home schooled, and was a PG to have a year in a formal school setting before going to college.