Turnitin is a tool integrated with Blackboard that checks submitted papers against billions of web pages and student papers to detect plagiarism through OriginalityChecks. It allows for online grading and feedback through GradeMark where comments can be directly added to papers. PeerMark also enables students to provide anonymous feedback on each other's work. Key benefits for students are easy submission, receipt confirmation, and feedback through a single interface. Lecturers save time with paperless grading and preset comments, while unoriginal content is flagged with links to sources. However, it requires internet access and only accepts certain file types like text documents.