Netherlands has become the first European nation and only the second country in the world, after Chile, to pass the law on net neutrality. In a nutshell, and quoting Wikipedia, net neutrality is the principle which advocates no restrictions by internet service providers on consumers' access to the networks that participate in the internet. This means no restriction on any content, site, equipment or method of communication.
To cite an example, Comcast was infamously caught for intentionally slowing P2P communications on their networks. Net neutrality seeks to remove such practices and more.
In the Netherlands, the passing of the law prohibits ISP from managing traffic except in the case of severe network congestion or security. The law also places restrictions on ISPs performing deep packet inspection and other similar wiretapping techniques.
Practically, what this means is that mobile internet providers like KPN in the Netherlands won't be able to charge for access to particular services like Skype or throttle traffic through them - techniques that the company was planning on using to manage its mobile traffic.