Studies have found that Netflix often accounts for more than 30% of Internet download traffic in North America. Netflix is a big player in terms of Internet bandwidth, and they want connections to be as fast as possible so they can provide high-quality streaming video. That’s why Netflix publishes an ISP Speed Index site, where they rank Internet service providers based on their average Netflix streaming speed.
Netflix ranks providers by their speed, highlighting the fastest ISP — Google Fiber in the USA, unsurprisingly — and shaming the slowest provider. These rankings can help you get some idea of what ISP offers the fastest speeds — for watching Netflix, at least.