One of the most compelling reasons why one should use Wikipedia is that it is open-source. For those who can't understand the term open source think of it as something which allows anyone to edit the information present on the site. Let me give you an example Windows is closed source because Microsoft doesn't allow anybody to edit the codes they have written for Windows though people do that and that is why we have so may tweaks for Windows. On the other hand Linux is open source. So basically open source is for those softwares which are not for profit.The huge number of users who register with the site to submit articles are also increasing daily and hence it it the most comprehensive encyclopedia which can be edited by only registering with the site. The number of articles have increased tremendously and not only in English. But be ready for the cons too. Recently Wikipedia's founder faced criticism of altering the article written about him. Another alarming report came in the newspaper recently that college students copied an article from Wikipedia and it was factually wrong. This is not to say that the information provided on the site is wrong but only a warning to all the people out there who think that they can directly copy from the site and think that their work is done. I shouldn't sound too pessimistic after all this site was a pioneer for online encyclopedias.Hope you enjoy surfing this site. It has got tons of info. Just verify the info if you want it for your projects or stuff for school. Happy Surfing.