The discussion of Net Neutrality has been all over the news. No matter which side of the argument you land on this decision is a major one. Rules put in place under the Obama administration classify broadband internet as a utility and require providers to treat it as such. That means that all data must be treated equally and providers can't block certain legal sites or prioritize others who pay a premium. It also ensures that internet connectivity remains accessible to everyone and provides for subsidies in low income and rural communities. The decision to dismantle the Net Neutrality guidelines comes on the heels of a March vote that repealed the FCC Broadband Privacy Rules. The trend has many very concerned about the future of a free and publicly accessible internet in the US.
Here are a couple of articles addressing more details: