Net neutrality is the principle that Internet service providers and governments regulating the Internet should treat all data on the Internet the same, not discriminating or charging differentially by user, content, website, platform, application, type of attached equipment, or mode of communication.
Without net neutrality, ISPs can force websites like Amazon or Netflix to pay additional fees to be accessible. Without net neutrality ISPs have the ability to smother their competition by simply making it inaccessible to consumers. Garage-based startups of the world simply cease to exist, unable to even reach market. If net neutrality is removed ISPs will have full reign over the internet, this likely means you can expect to see things like Internet fast lanes - what does that mean? Imagine having to pay extra money to access websites like Facebook or Hulu.
Net neutrality is what prevents monopolies and trusts from forming on the Internet. Removing net neutrality would without a doubt be the largest chilling effect in this history of humankind, it is the cornerstone of our modern world and what allows all businesses to utilize the Internet equally to reach customers. Net neutrally is what assures that the Internet is a free and open place for the exchange of ideas and thoughts, without it innovative progress would come to a halt and online startups would be a thing of the past.
Net neutrality is in the best interest of all small businesses, consumers and indeed humanity.