It is one of the best site not only for entertainment purpose but also for knowledge purpose.Not only that u can share ur experiences through videos and make your own channel for absolutely free.Youtube is one of the best site for people of all ages it is just like a personal tv and it has all the topics well explained and every information of all the topics is available.Youtube is the ocean of videos and lots of entertainment. youtube is good teacher also.YouTube does well by offering all the amenities that an audience member needs because the vast majority of people on the site are not contributors, simply spectators. A smart search function makes it easy to identify the video you are looking for, and a category search or other advanced search functions allow you to narrow your search even further. Ratings, descriptions and screenshot previews also make it easier to identify the video you are looking for.