cdn - SERP Analysis

https://www.akamai.com/glossary/what-is-a-cdn

https://www.cloudflare.com/learning/cdn/what-is-a-cdn/

https://en.wikipedia.org/wiki/Content_delivery_network

https://aws.amazon.com/what-is/cdn/

https://cloud.google.com/cdn

https://www.fastly.com/learning/cdn/what-is-a-cdn

https://cdnjs.com/

https://www.imperva.com/learn/performance/what-is-cdn-how-it-works/

https://www.reddit.com/r/HostingHostel/comments/1biztfn/what_is_content_delivery_network_cdn_how_does_it/

https://developer.mozilla.org/en-US/docs/Glossary/CDN