The most visited sites are searching sites and the next would be funny sites. Normally, the most famous searching site is Google, but Naver is most famous in Korea. Naver has 80% user and Google takes only 2% in Korea. Forces searching on Google but Naver operated total web service not only for searching but also school emails, SNS etc. I Specially used two function that IN and SNS has. IN is a knowledge database on user's Q&A. Someone posted a question and another user answers. If it's a good answer, other people recommend it on Facebook with a like button. Second, Facebook SNS use a share button for you to share it and notice by your college friends and coworkers. And finally, funny sites has articles and movie clips where I can read and watch to kill time whenever I'm board.