Turnitin is an originality checking and similarity detection service which encourages best practice for using and citing other people’s written material. Turnitin also provides a tool called Feedback Studio for tutors to give feedback to students.
When you submit an assignment to Moodle it will automatically submit to the Turnitin service. Turnitin’s software then compares your submission's text to billions of pages of digital content (including archived internet content that is no longer available on the live web) as well as over 110 million papers in the student paper archive, and 80,000+ professional, academic and commercial journals and publications. This produces an originality report for you and your tutors to view. This report will appear 10-15 minutes after submission to Moodle, however, this will happen for your first three submissions to the same assignment in Moodle in any given 24-hour period. If you re-submit your assignment a fourth time (even before the deadline) to the same submission point, the new originality report will take up to 24 hours to generate.