illustration the three pillars within seo
Jesse Commandeur

Jesse Commandeur

Content & Authority Specialist
13-11-2023 How to/DIY,

What are the three pillars within SEO? 

SEO is to improve a website's visibility in search engines, generating more traffic and ultimately more conversions or customer engagement. But what forms the basis of an effective SEO strategy? In this article, we explore the three fundamental pillars of SEO: Technical SEO, On-Page SEO and Off-Page SEO. In addition, we focus on how these complement each other and how they can be optimised for maximum success. We also tell you more about our free SEO training.

1. Technical SEO: The foundation of your website

Technical SEO refers to the actions that are onderaken to optimise the building blocks of a website. This includes aspects such as site speed, mobile friendliness, indexing, crawlability, site architecture and security. A strong technical foundation is essential for both search engines and users.

Why is site speed important?

A slow website can lead to a high bounce rate, with visitors leaving the site before it has fully loaded. Fast load times improve user experience and contribute to higher search engine rankings.

Mobile friendliness and security

With the increase in mobile internet usage, it is crucial for websites to be mobile-friendly. It is also important to have a secure connection (HTTPS), which inspires trust among users and is preferred by search engines. Find out more about technical SEO? Then also watch our onder standing video. 

2. On-Page SEO: Optimisation of content and structure

On-Page SEO includes all actions taken directly on the website to improve search engine rankings. This includes things like content, titles, meta descriptions and internal links.

How do you optimise for users?

Quality, relevant content that matches the user's search intent is essential. Using the right keywords, creating attractive titles and meta descriptions, and ensuring a logical structure with internal links improves both user experience and search engine visibility.

How important are keywords anymore?

Keywords are still important in SEO, but it is essential to use them in a natural and contextually relevant way. Keyword stuffing (spamming keywords into a text) is an outdated technique and can lead to search engine penalties.

3. Off-Page SEO: Building authority and links

Off-Page SEO includes actions that take place outside your own website to improve ranking. The most well-known form of Off-Page SEO is linkbuilding, where other sites link to your website (backlinks). These links act as a kind of 'voice' of trust and authority for search engines.

How do you build links effectively?

Getting quality backlinks from authoritative websites is crucial. This can be achieved through guest blogs, collaborations, or creating content that is naturally shared, such as infographics or 1TP15Research reports.

Which is more important, quantity or quality of backlinks?

Quality is much more important than quantity. A few high-quality links from trusted websites are much more valuable than a large number of links from less relevant or low-quality sources. 

Good to know is that we still have the CRO services have added to the three pillars. This is to ensure that websites not only get more traffic, but that the traffic also converts better. 

Want to learn more about SEO? Take our free SEO training course now

Are you new to the world of SEO and want to learn more about how to optimise your website for better search engine visibility? Our free SEO training for beginners is the perfect start. In this training we cover all the essential aspects of SEO, from the basics of technical optimisation to the intricacies of content creation and link building. You will learn practical skills that you can apply immediately to improve your website, increase your traffic and strengthen your online presence.



Any questions?

Get in touch! :) we are happy to help you with all your SEO questions

SEO question

Don't miss it

Subscribe to our newsletter and don't miss a single SEO tip

"*" indicates required fields

This field is for validation purposes and should be left unchanged.

Any questions?

Do you want to know more about SEO? Could your website use a new boost?
Get in touch

This is us!

A team of SEO specialists

Our team consists of enthusiastic SEO specialists who are happy to work with you for the best results.

Meet our team

These customers are supupside down from us!

Renzo van Dongen

Renzo van Dongen

Digital content manager Peugeot

Whether it's about content or technical adjustments, it doesn't matter. Martijn briefs this in a very clear way so that it can be implemented locally or by our head office in France. [...] Since the start of our collaboration, we have achieved great results. Keep it up!

Marien van Stegeren

Eigenaar Kitcentrum

When your online onder venture grows, expectations often grow too, in every area. To a large extent, we were in control of SEO and its interpretation ourselves. We found out that our own "general view" was no longer sufficient, so we engaged Bureau Onder. Surprising and clear. We have built up a fine collaboration, partly because Martijn also regularly visits our office with Eline or Mariska (depending on the case), which is very valuable to us!

Marten Stellingwerf


Martijn and Mariska make the SEO story understandable for the layman and are happy to think along with us. It is nice that there is a personal contact moment every month with an extensive report and the opportunity to talk everything through. After just a few months, Onder has already managed to achieve number 1 positions on Google with some of our webshop pages. We are very satisfied with Onder.

Mark Prummel

SEO Specialist Stella Fietsen

For several years, Onder has been a valued partner of Stella. Martijn is my sparring partner for complex SEO issues and the extra pair of critical eyes that keeps us on our toes. Together, we have achieved nice growth in online visibility, visitor numbers and leads. Onder onder stands out for its short lines of communication and professionalism. They speak our language: don't nag, get down to business. That is what we love!


Don't miss a single SEO insight
  • Insights on SEO
  • For beginners and advanced specialists
  • From experiments to developments at Google and from
    best practices to our own cases
  • A look behind the scenes at Onder

"*" indicates required fields

This field is for validation purposes and should be left unchanged.