Concrete impacts and advantages?

Is the use of CDNs really useful for natural referencing (SEO)? Should it always be used or is it only recommended in certain cases? Does owning a CDN improve your SEO position? Here is an overview of the impact of content delivery network on SEO and the opinion of John Mueller (Google) on the issue.

What is CDN?

A CDN (Content Delivery Network) is a network of servers located in different places around the world that contain copies of certain static files of a website (images, videos, JavaScript, CSS, etc.). When an Internet user accesses a website that uses a CDN, it is redirected to the server closest to it, which helps reduce latency and improve page load speeds.

How does CDN work?

There are different types of CDNs, but the basic principle is: Files are duplicated and stored on different servers (Points of Presence or PoPs) around the world, allowing users to access files faster because they are usually closer to the server where the file is located. is the host.

CDN acts as an international network of servers. Instead of having only one copy of the main page files on one server, the content delivery network acts as an international network of servers where the main files will be available for faster loading by nearby Internet users.

Why use CDN?

The use of CDN, as part of the SEO approach or not, allows to reduce the distance between the web server and the user, resulting in reducing website loading time for internet users away from the server hosting the original website files.

What are the benefits of CDN for SEO?

The the benefits of CDN for SEO multiple, allows:

  • speed up page loading;
  • reduce the number of server requests;
  • improve accessibility;
  • distribute the load in case of peak traffic;
  • to reduce latency.

Use a The CDN will be of particular interest to websites with an international audience (for example, online stores or pages translated into several languages).

It can also be interesting for websites that are on less powerful shared hosting insofar as CDN can distribute the load of all types of traffic (humans and bots) and thus limit the risk of error 500 on a small server. .

Does using CDN lead to better SEO positions?

John Mueller, a webmaster trend analyst at Google, answered this question in a webmaster hangout.

According to him, there is there is no direct and significant impact on SEO using CDN if the homepage loads quickly and most visitors have a fast page.

However, the use of this type of technology can have two advantages indirectly related to SEO :

  • Improving the user experience due to improved load times for visitors away from the home server (eg in other countries);
  • Improve Google’s indexing (and therefore improved indexing) for sites with many pages that load slowly.

The use of CDN is therefore not an essential element for SEO when the vast majority of its audience is not located in a country other than the country in which the website is located.

What are the best CDNs on the market?

There are many CDN providers on the market, but which are the best? It is important for SEO to choose a reliable and efficient CDN, capable of guaranteeing fast and secure delivery of content. Some of the most popular CDNs include Cloudflare, Amazon AWS Cloudfront, Incapsula, CDN77, KeyCDN, StackPath and Fastly.

If you want to set up a CDN for your site, as part of an SEO approach or not, we strongly recommend that you contact your web host so they can advise you which is best based on your infrastructure and your needs.

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