What is SEO? Simple Explanation for Beginners in 2026

Simple definition of SEO#

SEO is the art of making your website visible on Google without paying for advertising. The better your SEO, the more free visitors you get.

SEO vs SEA: what's the difference?#

How does Google work?#

To understand SEO, you need to understand how Google finds and ranks websites. It's a 3-step process:

1. Crawling#

2. Indexing#

3. Ranking#

The 3 pillars of SEO#

Pillar 1: Technical SEO#

• Loading speed: your site must load in under 3 seconds
• Mobile-friendly: the site must work perfectly on smartphones
• HTTPS: SSL certificate (padlock in the address bar) is mandatory
• Clear structure: a logical and organised site architecture
• XML Sitemap: a file that lists all your pages for Google

Pillar 2: Content#

• Answer a question: each page must have a clear objective
• Use the right keywords: the terms your customers type into Google
• Be comprehensive: cover the topic in depth (minimum 800 words for a service page)
• Be unique: original content, not copied from elsewhere
• Be up-to-date: Google prefers recent and maintained content

Pillar 3: Popularity (backlinks)#

The more links you have from quality websites, the more Google considers your site reliable and relevant.

• Register on directories (Pages Jaunes, Sortlist, etc.)
• Create quality content that people want to share
• Build partnerships with other businesses
• Write guest articles on other blogs

Keywords: the foundation of SEO#

What is a keyword?#

• "web agency Brussels"
• "how much does a website cost"
• "how to appear on Google"

Types of keywords#

Where to place your keywords#

Strategic places for your keywords:

1. Title tag: the title that appears on Google (60 characters max)
2. Meta description: the text under the title on Google (155 characters max)
3. H1: the main title of the page
4. URL: the page address
5. First paragraph: mention the keyword in the first 100 words
6. Image alt tags: text description of images

Local SEO: essential for Belgian businesses#

Google Business Profile#

Create and optimise your Google Business listing:

• Complete information (address, phone, opening hours)
• Correct business category
• Quality photos
• Customer reviews (aim for 10+ with 4.5 stars)
• Regular posts

The Local Pack#

How much does SEO cost?#

Doing it yourself#

SEO can be done for free if you invest the time. The essential tools are free:

• Google Search Console
• Google Analytics
• Google Business Profile
• PageSpeed Insights

Hiring a professional#

Professional SEO services in Belgium cost:

• Initial SEO audit: €500 – €2,000
• Monthly support: €300 – €1,500/month
• Content writing: €150 – €400 per article

The most common SEO mistakes#

Mistake 1: Expecting immediate results#

Mistake 2: Keyword stuffing#

Repeating the same keyword 50 times in a text is counterproductive. Google penalises "keyword stuffing". Write naturally.

Mistake 3: Ignoring mobile#

Mistake 4: Not creating new content#

A site with 5 static pages will always struggle to rank. A regular blog with quality content is the best SEO lever.

Mistake 5: Forgetting Google Business Profile#

Where to start? 5-step action plan#

1. Create a Google Business Profile (1 hour) — immediate local impact
2. Sign up for Google Search Console (30 min) — submit your sitemap
3. Check the technical basics (1 hour) — HTTPS, speed, mobile
4. Optimise your existing pages (2-3 hours) — titles, descriptions, H1
5. Start creating content (recurring) — minimum 1 article per week

FAQ#

What's the difference between SEO and referencing?#

None. SEO and natural referencing are the same thing. "Referencing" on its own can also mean paid referencing (SEA/Google Ads).

Does SEO still work in 2026?#

Absolutely. SEO evolves (AI, voice search, AEO) but the principle remains the same: sites that offer the best content for users are rewarded by Google.

How long to reach the first page?#

Is SEO dead with AI (ChatGPT, etc.)?#

No. AI changes how people search, but well-ranked websites are also the ones that AI cites as references. SEO adapts and remains relevant.

I have a small budget, what should I prioritise?#

Google Business Profile (free) + optimisation of your existing pages + 1 blog article per week. That's the minimum that can already make a big difference.