One of the big challenges of college admissions and of college work itself is writing. When you apply, you have to write application essays. When you take college courses, you have to write term papers and other assignments that require research and skill with the language. Sometimes the pressure mounts until it is almost too much for students to handle. That's when the temptation to use the Internet for helps may become too much to resist. Thus, that nasty term "plagiarism" raises its ugly head.
Things have become more dangerous these days for aspiring plagiarists, though. Creative software engineers have created a number of programs that are becoming more and more popular to catch those who think writing is as simple as Googling their prospective topics. One such program is Turnitin (clever name, eh?).