Introduction
SEO, or Search Engine Optimization, refers to all the practices used to improve a website’s visibility in search engine results like Google. In simple terms, it’s about helping a site appear among the top results when someone searches for information, a product, or a service online.
Why does it matter? Because today, most buying journeys or information searches start with a search engine. A good position means being visible on a regular basis to people who are already interested in what you offer.
SEO is built on three main pillars that work together:
- Technical, which ensures the site is accessible, easy to read, and indexable
- Content, which addresses the needs of users
- Popularity, which builds the site’s reputation with search engines
In this article, we’ll take a closer look at these three pillars, how they interact, and why combining them is necessary to grow online visibility.
Pillar 1: Technical SEO
What is Technical SEO?
Technical SEO covers everything that allows search engines to properly explore, understand, and index a website. You can write the best content in the world, but if Google’s crawlers can’t read it, it will stay invisible.
This is the foundation on which all SEO work is built.
Main technical areas
1. Crawlability and indexability
Search engines use crawlers to discover and analyze pages. To make sure they work correctly, you need to:
- Avoid blocking errors such as 404 pages or infinite redirects
- Check that robots.txt files and meta robots tags are set up properly
- Make sure key pages are not unintentionally blocked
2. Crawl budget optimization
Each site has a limited crawl budget. Google won’t spend unlimited time on every page. To make the most of it:
- Remove or redirect outdated content
- Avoid generating large numbers of useless pages (for example, poorly configured filters on an e-commerce site that create thousands of empty URLs)
- Organize content so that high-value pages are easy to access
3. Site performance
Slow websites frustrate visitors and increase bounce rates. Google also looks at Core Web Vitals, which measure:
- Loading speed
- Visual stability of the page
- Responsiveness during interactions
4. Mobile compatibility
Most searches now happen on mobile. Google even crawls with its mobile-first bot (Googlebot mobile). This means websites must adapt smoothly to every screen size.
5. Security and HTTPS
Sites served over HTTPS build trust with users and meet Google’s requirements.
6. Internal linking and site structure
Internal linking connects pages within the same site. A clear structure helps to:
- Make navigation easier for visitors
- Guide crawlers to the most valuable pages
- Spread PageRank from one page to others
- PageRank is a metric Google uses to evaluate the weight of a page based on the number and quality of incoming links.
7. Redirect management
During a redesign or a domain change, proper 301 redirects are needed to keep SEO history and prevent traffic loss.
Main tools for technical SEO auditing
| Tool | Main use |
| Google Search Console | Check indexation, track errors, review page performance |
| Screaming Frog | Crawl the site to detect technical errors, redirects, missing tags |
| PageSpeed Insights / GTmetrix | Analyze speed and provide optimization suggestions |
| Ahrefs, SEMrush, Moz | Complete audit including backlinks, content, and technical aspects |
| Fichiers de log | Understand how crawlers behave on the site |
Pillar 2: Content
Content is what users come for: answers to their questions, explanations, product descriptions, and more. Without content, a site has no chance of appearing in search results.
Good content:
- Matches the search intent of users
- Provides clear and useful information
- Gets rewarded with better visibility in search engines
Types of content that work well for SEO
Common examples include:
- Service pages: explain what the business offers
- Blog posts: share insights, advice, and expertise
- Product pages: persuade and reassure potential buyers
- FAQs and glossaries: give quick answers to recurring questions
- How-to guides: provide in-depth resources on a topic
- Comparison pages: help users make buying decisions
- Category pages: group and organize products
- White papers: explore a topic in detail and collect leads
Best practices for optimized content
1. Research first
Before writing, it’s important to understand your audience and the questions they’re asking. This step lays the groundwork for content that is genuinely useful, avoids being too generic, and provides precise answers to what people actually want to know.
2. Keyword research
Once needs are identified, these questions should be translated into keywords that search engines can recognize and link to a page. Focusing on intent helps create content that matches different stages of the user journey, whether it’s to inform, compare, or encourage action.
3. Page structure
Structure affects readability for both users and search engines. Well-structured pages keep visitors engaged longer and send Google a positive signal about quality.
4. Optimizing tags and images
Tags and images may seem minor, but they play an important role in SEO. When done properly, they strengthen visibility and improve the user experience.
5. Writing quality
The quality of the text is what readers notice most. Good writing builds trust, keeps people on the page longer, and increases the chances of the content being shared.
E-E-A-T and content quality
Google values trustworthy and authoritative content through the concept of E-E-A-T:
- Experience: proven, hands-on knowledge in the field
- Expertise: deep understanding of the subject
- Authoritativeness: recognition from other sites or industry voices
- Trustworthiness: reliability and site security
To support this, you can:
- Highlight authors and their credentials
- Reference reliable, up-to-date sources
- Regularly review and update information
Pillar 3: Popularity (or link building)
What does popularity mean in SEO?
Popularity reflects how a site is recognized by others. In practice, this comes from backlinks, which signal to Google that a site can be trusted. The more these links come from reliable, topic-related sites, the stronger the reputation.
Backlink quality criteria
A good backlink typically comes from:
- A trusted site closely related to the topic
- A natural placement within editorial content
- An anchor text that is descriptive without sounding forced
Ways to build popularity
- Linkbaiting: creating content so engaging that others share it on their own
- Press relations and partnerships: gaining mentions in media or on partner sites
- Guest posts: publishing on other blogs to reach new audiences
- Industry networking: collaborating and exchanging with others in the same field
What to avoid
Some practices can lead to penalties:
- Mass link buying: purchasing hundreds of links from low-quality or unrelated sites may look like a shortcut to higher rankings, but Google’s algorithms easily detect this and it can cause a sudden loss of visibility.
- Artificial networks (PBNs): Private Blog Networks are groups of sites created only to link to another site. Google is increasingly effective at spotting these setups and penalizes sites that rely on them.
- Forced or automated link exchanges: large-scale “I link to you, you link to me” schemes, or using software to generate links automatically, create an unnatural profile. This sends a negative signal to search engines and can seriously damage a site’s credibility.
How the 3 pillars work together
A necessary synergy
A well-built site without content will stay invisible. A content-rich site with technical errors won’t be crawled properly. A site with strong content and solid technical setup but no popularity will struggle to get noticed.
The three pillars must work hand in hand.
A real-world example: Assure Direct
One of our clients, Assure Direct, faced an indexing issue: their pages weren’t showing up on Google. After fixing the technical setup, we created targeted content for their audience and then grew their visibility through press coverage.
In less than two years:
- The site went from 0 to 1,500 monthly visitors.
- Quote requests took off.
- The brand gained visibility, with regular mentions in both industry and local news.
Conclusion
SEO is built on three pillars:
- Technical: making sure the site is accessible and understandable for search engines.
- Content: meeting user needs with clear, useful information.
- Popularity: building reputation through links and mentions from other sites.
It’s an ongoing effort, since search engines evolve, user behavior changes, and competitors never stop moving.
We support many businesses looking to grow their online presence. If you’d like to know how your site is performing and how to boost its visibility, get in touch with us for an audit or tailored SEO support.
