Yahoo answers is a free website where you can get answers to your questions from people who know these answers. As the answers are given by fellow people, there is a personnel touch attached to it. How so ever the question may be, you will get a answer. On the other hand you can also answer to gain points.
The thing I like the most about this site is the fact that you can gain knowledge in a fun way. It is a game like scene where in you gain points for giving answers. This forces the people to learn about the various topics. This site has many competitors but this site is the best because it is the simplest to use. The website is well designed and the loading times are quite quick.
On the other hand sometimes your questions get rejected without getting any reason as to why the did so. The experience while using this site was quite good.