Internet neutrality is very important. All Internet traffic should be treated equally no matter if you are visiting political forums, YouTube, porn sites or whatever; all users and companies should have equal access. In my opinion it should be required by law. Internet is one of the greatest technology of our culture, it stimulates competition, promotes innovation, helps protecting freedom of speech and drives businesses. It is important as a protection of current freedoms. Without the Internet those big companies out there would have a control over us, over how we access out favorite websites and services. Look what's happening in China or in North Korea. These are the countries where Internet is heavily censored.
Net neutrality (also network neutrality, Internet neutrality, or net equality) is the principle that Internet service providers and governments should treat all data on the Internet the same, not discriminating or charging differentially by user, content, site, platform, application, type of attached equipment, or mode of communication. The term was coined by Columbia University media law professor Tim Wu in 2003, as an extension of the longstanding concept of a common carrier. More: en.wikipedia.org.
A free and open internet is the greatest tool available to humankind on the planet right now. It has the capacity to educate and liberate people all over the world, and for that reason it has become threatening to those who have a vested interest in maintaining the status quo, or, simply keeping people ignorant.
Within my own lifetime the internet has enabled a level of global consciousness never before possible, it is revolutionary by nature, and therefore will continue to be targeted by repressive forces. If we humans wish to keep this treasure alive, we will have to fight to protect it from those who would destroy it.
Net neutrality is a matter not just of a free dialog and what has become a public square remaining public (even as we've regrettably allowed unaccountable corporate tyrannies to take over those public squares), but also a matter of fair competition. It is absolutely essential to protect consumers.