Net neutrality is the idea that the internet should be free and open for everyone. If a service provider can block you from seeing certain content or can make you pay extra for it, that hurts all of us and we should have rules against it.
The internet isn't nearly so important as racial injustice and vanquishing white supremacy, nor smashing patriarchy, nor rescuing our planet from looters and clmate vandals, nor feudal inequality: but EVERY ONE of those fights will be won or lost with the internet
Internet providers have a legal obligation not to block or limit your access to a website. Cable companies can't decide which online stores you should shop at or which streaming services you can use. And they can't let any company pay for priority over its competitors.