1. The document discusses what is needed to connect the billions of people and devices on the internet, including connecting to local internet service providers and their networks connecting to each other and content providers.
2. It explains that internet backbones are the large global networks that connect the entire internet, as directly connecting to each of the over 50,000 networks would be impossible.
3. Key factors in quality internet backbones are minimizing the number of hops between networks to reduce delays, avoiding routes that cross long distances unnecessarily, prioritizing direct connections where traffic is highest, and ensuring network redundancy through diverse routes.