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What is a CDN?

CDN (Content Delivery Network) — TAP-ONE Glossary

A network of servers in multiple locations that deliver website content faster by serving it from the nearest server.

Last updated: 8 August 2026

A Content Delivery Network (CDN) stores copies of a website’s files across servers in multiple geographic locations, so a visitor’s request is served from the nearest available server rather than a single distant one — reducing load time significantly, a performance factor covered in web.dev (opens in new tab)’s guidance, especially for visitors far from the primary hosting location.

Not Just for Global Audiences

A CDN is often thought of as something only relevant for websites with international visitors, but it also helps with resilience — if one server location has an issue, a CDN can often route around it — and with handling sudden traffic spikes, which matters just as much for a purely local business that gets a burst of attention from a promotion or a mention somewhere.

It also typically handles image and static file caching efficiently, which contributes directly to the same page speed and Core Web Vitals scores that affect both user experience and search ranking.

People also ask

Does a small local business need a CDN?

It helps even for a purely local audience, since it improves load speed and resilience, and most modern hosting and website platforms include CDN delivery by default at no extra setup effort.

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