What is "Net Neutrality " ?

The term of Net Neutrality is difficult for me to understand, but it means fair to everyone who use Internet.
In other words, Internet providers should not give their contents and services better treatment than other servises through their network.
The idea of Net Neutrality is to deal justice to all.

In America, this problem was debated in the Senate in 2006. It is because if Net Neutrality is used properly, that means what we use or watch on the Internet is controlled by Internet providers. Control of information is hugely powerful. (for example, Chinese government controlled the Internet because of political reasons.)

In America, there are two opinions. One is that Net Neutrality is important because people cannot decide rightly without fair information. The other says that, there is not free with Net Neutrality. This discussion continue now.