How to Use a Content Delivery Network (CDN) for SEO

One of probably the most tough duties an SEO skilled has is telling your organization or shopper their website is sluggish and clunky – and worse, that the content material they spent a lot money and time on is the issue.

This is the place a Content Delivery Network (CDN) might help.

If you’re investing in creating high-quality content material, it’s best to most likely additionally rethink the way you handle your digital property and spend money on a CDN.

In this column, you’ll be taught what to look for in a CDN, how a lot utilizing a CDN could value, and customary implementation points to be careful for.

What Can a CDN Do for Your Business?

The means photos and video are built-in (or not) into the ecosystem of the web site could make or break its efficiency.

That goes for inventory pictures, shot and styled photographs, video, HTML/JavaScript/CSS information, product and ecommerce photograph libraries, audio-only information, and punctiliously crafted graphic designs alike.

Think of CDNs like an EZ-Pass. CDNs basically act as a multiple-path visitors intersection the place completely different web suppliers and servers can join and supply one another with entry to the web site visitors coming from every supply.


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They cross property and visitors forwards and backwards because the property are known as up by web page masses moderately than ready for every asset to load on particular person pages, or render as a hard-coded component.

This occurs world wide in a number of places, moderately than counting on a single server for all content material service and supply.

These hosts of servers maintain cached information prepared to render when known as to lower load time and basically shrink the trail to supply.

Similarly, having a CDN is like leaping on the turnpike and scanning your EZ-Pass as a substitute of taking a journey over slower backroads to your vacation spot. CDNs enhance velocity and effectivity by optimizing net visitors routes.

See Content Delivery Network (CDN): What It Is & How It Works to be taught extra concerning the fundamentals.

How CDNs Support Organizational SEO Goals

CDNs have turn into an business normal (significantly in enterprise SEO) and are solely turning into extra worthwhile as content material advertising and marketing investments improve.

Any SEO skilled price their salt can let you know that velocity is an extremely vital consider each enhancing web site rankings and total web page and consumer expertise.


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It’s not precisely a secret that Google locations nice worth on web page expertise. As a corporation, it has taken nice efforts to incentivize environment friendly net rendering and trigger minimal consumer disruptions.

Nearly each (publicly mentioned, anyway) Google algorithm replace within the final a number of years has included components for enhancing web page expertise, velocity, and content material supply.

The longer content material takes to render and serve, the extra doubtless a consumer is to abandon their efforts and transfer on. Every rage-quit on a web page that wouldn’t load is cash or a lead misplaced.

Not solely that however velocity is carefully tied to the much-anticipated Core Web Vitals replace.

Beyond the UX perform, a CDN additionally provides a layer of safety to your web site by guaranteeing safe encryption and switch, distributed knowledge, a present SSL, and balanced visitors masses.

This helps defend what you are promoting from denial-of-service (DDoS) cyberattacks, the place the nefarious purpose is to create a visitors surge in an try to overload and crash a server.

DDoS assaults are estimated to double to over 15 million a 12 months by 2023. The time to put together for safe asset administration is now.

What to Look For In a CDN Solution

Probably a very powerful consideration is whether or not the CDN is quicker than your origin. If not, what’s the purpose?

You also needs to be sure it does effectively at delivering small information and huge payloads alike.

Ideally, you’ll have the chance to demo your potential CDN options. Here are a few frequent metrics you’ll need to take a look at and discover:

  • Last-mile and end-user DNS response time. You don’t need to take a look at in-house solely to be taught after implementation that a complicated DNS setup is creating lengthy waits for finish customers.
  • Peak hour efficiency. If your web site experiences massive fluctuations in visitors primarily based on days of the week or occasions of the day, you’ll need to be sure that you strain take a look at the CDN response when it is going to matter most.
  • Connect time. Here, you’re particularly wanting for glorious community connectivity, low latency, and nil packet loss.
  • Wait time on much less well-liked property. CDNs are a shared setting, and also you need to be sure you’re conscious if much less requested property are being retrieved from the origin server versus served from the sting (as well-liked property are).
  • Cache Hit/Miss. You ought to see this expressed as a ratio in your dashboard, and also you don’t need to see many requests coming again to the origin.
  • Throughput. This shouldn’t be decrease than the origin for property of any measurement.
  • API integrations. Future-proof your funding a little by ensuring that the CDN will be configured together with your present, in addition to wishlist, software program.

As far as what to look for in a CDN supplier, you need to be sure that they’ve a giant, various community. Akamai, for instance, is the most important CDN supplier and boasts over 300,000 servers in 130 nations.

You additionally need to know that the placement of its servers meets the wants of your viewers — each in the present day and as you doubtlessly develop into new markets.


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If you’re wanting for enhancements in content material supply throughout South America or Africa, for instance, you’ll need to guarantee your alternative of CDN has ample servers in these areas. This will limit your choices greater than for those who’re focusing on North America or Europe, which have huge server networks.

How Much Does Using a CDN Cost?

Like all advertising and marketing options, there may be a lot of variability in value.

The larger the ask by way of content material load, the costlier the answer. This is why CDNs could not make sense for tremendous small web sites; it’s simpler to manually optimize every picture or asset and save the fee.

However, for medium to enterprise-level websites, content material technology and sprawl rapidly make handbook optimization and curation an inefficient means to handle and ship content material throughout net properties.

Though it might be extra expensive in precise {dollars} than doing it your self, the work A) truly will get carried out and B) doesn’t value you gross sales and leads due to sluggish server response time and a irritating consumer expertise.


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Generally, medium-sized companies can count on to pay round $200+ in month-to-month prices, and huge to enterprise-level options are virtually all the time a customized quote.

The benefit of these plans, behind the pricing fog, is that additionally they usually have assured security measures, enhanced analytics and consumer knowledge accessible, up-time ensures, and enhanced supply/cache choices to guarantee a optimistic expertise irrespective of how giant the positioning.

You would possibly discover that CDN charges range relying in your places, as effectively, due to the server community points talked about above.

Watch for Common Issues in CDN Implementation

If you’ve been studying and ready for the opposite shoe to drop, there are a few minor drawbacks to utilizing a CDN, principally associated to getting it arrange correctly.

All of those have pretty easy options however for those who’re about to undergo a content material migration to a CDN, it’s price stepping into with eyes open.

May Require a Developer for Integration

Plenty of internet sites combine properly with CDNs, however for those who’ve gone customized, getting it configured on a customized setup could possibly be a little bit of a headache and required some devoted developer intervention.


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Need to Budget for Using a CDN

It’s an additional value on high of present internet hosting/web site prices.

Network Providers May Block the CDN

A couple of (only a few, however nonetheless price noting!) community suppliers could block the CDN. The commonest offender on Reddit threads seems to be the Microsoft Ajax CDN associated to jQuery, however there are naming workarounds that normally resolve the problem.

Traceroute Issues

If your CDN is utilizing a third-party geo-mapping database, there may be potential for an end-user to be assigned the unsuitable IP tackle. QA this in the course of the setup course of, and as usually as yearly, to be sure the CDN isn’t sending requests through an illogical, prolonged path.


The TL;DR of CDNs is that they assist ship content material throughout your website rapidly, which in flip improves consumer expertise and web site performance, securely, and with restricted impacts in your server.

Companies that use a CDN to host and distribute content material may even see improved search rankings and may count on a safer web site, and a higher total consumer expertise.


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