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Content Delivery Network (CDN)

A content delivery network or content distribution network is a geographically distributed network of proxy servers and their data centers. The goal is to provide high availability and high performance by distributing the service spatially relative to end-users.
A faster website achieved through the use of a content distribution network will help directly improve SEO. Since Google’s ranking algorithm takes website speed into consideration, the faster your website is, the better chance you have moving up in the SERPs.
https://www.keycdn.com/support/7-reasons-you-should-use-a-content-distribution-network

Resources

Glossary Topics