Content delivery networks (CDNs) aren’t just for websites and streaming media anymore. They are essential for many businesses. In fact, more than ninety percent of content traffic we see today comes from a CDN, be it commercial or purpose-built. It's essentially impossible to build a content service with a noteworthy user base without using a CDN. Social networks, streaming services, gaming services, and the like: Anything that conveys reach and heavy or performance-sensitive data requires a CDN.