Computer Terms: What Is "Net Neutrality"?

Net neutrality is the term made in the European telecommunication law, and it referrers to that every access to the Internet is opened equally to all. In other words, we can use the Internet according to the favor. Therefore, there is no power in the market to competition against another. Moreover, Google and Yahoo are the companies created under this rule.
However, the net neutrality has been a major problem in the U.S. because the telecommunication companies started to make their quality of services high in order to compete. The companies use power to discriminate between traffic types or content provider.
Net neutrality is very important for us because we cannot use the Internet freely and enjoy without this principal. Thus, I hope that net neutrality would not be the ideal, but the actual rule.