What Is a CDN? And How Does it Improve a Website?

A slow loading website sucks! Isn’t it? Nobody likes to wait. It gives nothing but a bad user experience.

If you won a blog or website then keep in mind that you may lose a ton of visitors or potential customers just because of a slow loading webpage. Even Google now agrees that they see website speed as a ranking factor.

So what to do?

Use CDN. Let me tell you that there are many ways to increase your website speed and CDN is just one of them.

What is a CDN

What is a CDN?

CDN or Content Delivery Network is a network of servers distributed all around the globe to provide fast delivery of internet content.

The main goal of a CDN is to deliver content to end-users as fast as possible.

Nowadays almost every major websites such as Facebook, Amazon, Netflix etc.. use CDN to deliver content to their users.

How does a CDN work?

Without going into the technicalities, let’s understand how does a CDN work, in simple terms.

Let’s imagine that you are from the USA and you run an online store.

You have customers from all around the world but you ship the ordered items only from the USA.

If someone from India orders an item from your store then it takes a lot of time for the item to be delivered to India.

You realize that it is hampering your business and you start holding your inventories in different locations around the globe.

Now if someone orders an item from anywhere in the world instead of shipping the item from the USA you start shipping it from the nearest inventory with respect to the ordered location.

In this situation, the same item will be shipped much faster than the previous situation.

A CDN works exactly on the same principle.

A CDN acts as a mediator between the hosting server and the end-user.

CDN caches all the static content of a website such as scripts, text, images, videos, documents, software etc..

When a user sends a request to the hosting server the request first goes to the nearest CDN server and instead of sending the request to the hosting server the CDN serves the requested page.

In this way, the content gets delivered to the user as fast as possible. As a result, it increases your website’s loading speed.

Some of the popular CDNs are Cloudflare, Max, Amazon Cloud Front, Incapsula etc..

CDN is a great way to increase web loading speed but the advantages of using CDN doesn’t end there. There are several other benefits of using a CDN, let’s look into them.

Advantages of using a CDN

Increases website loading speed

We have already discussed how it increases the website loading speed using it’s caching mechanism.

As a result, it reduces the bounce rate and increases visitor engagement.

Reduces bandwidth cost

By using it’s caching and other optimization techniques it reduces the amount of data a hosting server must provide.

This reduces the bandwidth consumption and the bandwidth cost gets reduced accordingly.

Increases security

A CDN server blocks any malicious request even before reaching the origin server.

It keeps the site secure with TLS/SSL certificate which ensures a high standard encryption.

It minimizes website downtime

When a website gets a lot of traffic it may put a huge amount of load on the hosting server and the website may face a downtime.

As the CDN distributes the traffic evenly among several servers, it reduces the load on the primary server and the possibility of downtime gets reduce.

Blocks spammers and bad boats

Protects website from DDoS attack

I hope this article was helpful to you.

If you like this post please don’t forget to help others by sharing it with them. If you have any doubt or any suggestion regarding the above topic please feel free to comment down below or contact me directly. I will be very glad to help you in every possible way.

If you want to learn more about WordPress optimization I think you should check out the following articles too.


What Is a CDN? And How Does it Improve a Website?

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