Turnitin is an academic integrity platform widely used by schools and universities to review written submissions. It compares a paper against published sources, web content, and institutional databases, then generates a similarity report showing where matching text appears.
A Turnitin similarity score is not automatically a plagiarism verdict. Instructors usually read the report in context, because legitimate matches can come from quotations, references, templates, or common terminology. The report is best understood as a review tool that helps educators evaluate citation quality, source use, and originality.