Wikipedia.org is one of the best site where I can get information related to every field, .
It helps in studies alot, wikipedia have more content and it gives very reliable results. Wikipedia makes everything so easy means the most of the scintific terms that I can not easily understand but after searching on wikipedia all the points regarding my studies become crystals clear.
There are so many plus points of this site access to this site is also very easy there is no delay time. And the content in like short form just like lectures notes that can easily understand and can increase our knowledge by visiting wikipedia.org.
Wikipedia.org is like the whole world in just one click. Its really very helpfull.