A pre-sentence investigation report is used in Florida to help a judge determine how to sentence you. If you plead guilty or are convicted of a felony, the judge will order Probation to conduct an extensive background check basically. They will contact your parents, your work, find out all about your background. That will go into a report that's sent to the judge. Based on that report, he will or she will decide where you fall within the guidelines in Florida and sentence you appropriately.