SEO (Search Engine Optimization)
SEO, or organic search, covers all the techniques used to improve a website's position in Google's search results without paying for advertising.
Why it matters
SEO is the most profitable acquisition channel over the long run. It brings in qualified traffic, free of charge, that feeds your business around the clock. Without SEO, your site is invisible to the 93% of online experiences that start with a search engine.
The 3 pillars of SEO
Organic search rests on three core pillars which, taken together, determine how visible your site is in search results.
Technical SEO covers your site's infrastructure: loading speed (a site that loads in under 2 seconds has a bounce rate 9% lower than one that takes 5 seconds), mobile compatibility, clean HTML structure with properly ordered heading tags, an SSL certificate, a robots.txt file and an XML sitemap. Google has used mobile-first indexing since 2019: it is the mobile version of your site that is analysed first.
On-page SEO is about content. Every page should target one main keyword and a set of secondary keywords. Title tags (60 characters max), meta descriptions (155 characters max) and heading tags structure the information for Google. The content must match the searcher's intent: informational, transactional or navigational.
Off-page SEO covers everything that happens away from your site, mainly backlinks. One link from a high-authority site (DA 50+) is worth more than 100 links from low-quality directories. Link building remains the ranking factor that is hardest to control.
Why SEO is a profitable investment
According to a BrightEdge study, 53% of all web traffic worldwide comes from organic search. Unlike paid search, where you pay for every click (between €1 and €15 depending on the sector), SEO traffic is free once the positions are won. A site ranking well for a keyword with 1,000 monthly searches, with a 25% click-through rate in position 1, brings in 250 free visits a month, or 3,000 visits a year.
SEO returns are measured over 6 to 12 months. The first results usually appear after 3 months of work, but the cumulative effect is powerful: every optimised page keeps attracting traffic for years.
The most common SEO mistakes
Plenty of businesses make mistakes that quietly undermine their rankings: duplicate content across pages, missing alt tags on images, pages that are too slow because the images are not compressed, no internal linking, and neglected local SEO for businesses with premises.
Local SEO: essential for small businesses
For businesses that serve a specific area, local SEO is crucial. That means optimising your Google Business Profile, keeping your NAP details (name, address, phone) consistent across every directory, and collecting Google reviews. 46% of Google searches have local intent, and 76% of people who search for a local business on their phone visit it the same day.
The different types of SEO worth knowing
Beyond the three pillars, several specialisms are useful for a tradesperson or a sole trader. Content SEO means publishing articles regularly that answer your customers' questions: a heating engineer who writes a guide on boiler prices captures prospects well before they decide. E-commerce SEO optimises product pages and category pages for buying queries. Video SEO targets rankings on YouTube, the world's second largest search engine. Image SEO uses alt tags and file names to appear in Google Images, often overlooked even though it is a free source of traffic. Finally, local SEO remains the priority lever for any business serving its own area.
Your basic SEO checklist to get started
Before going after competitive keywords, make sure the foundations are solid. Here is a practical checklist you can work through in a few hours:
- Check that every page has a unique title tag and a hand-written meta description - Set up Google Search Console and submit your XML sitemap - Compress every image and fill in its alt attribute - Create and optimise your Google Business Profile (photos, opening hours, description) - Build internal links between your service pages and your blog articles - Check mobile loading speed, aiming for under 2.5 seconds - Remove any duplicate content across pages
This foundation already covers 80% of the technical problems found on small business websites.
Measuring your SEO results
SEO is steered with numbers, not gut feel. Three free tools are enough to begin. Google Search Console shows your average positions, impressions and clicks for each keyword: it is your main dashboard. Google Analytics 4 measures real organic traffic and what it does (page views, conversions). Google Business Profile Insights reveals how many people find your listing and call you. One telling example: a bakery that moves from page 3 to position 2 for "artisan bakery + its town" multiplies its clicks by 8, because the first page takes around 95% of clicks and the top three results alone take more than 55%.
SEO best practice in 2026
SEO moves fast, but a few principles hold steady. E-E-A-T quality (experience, expertise, authoritativeness, trustworthiness) has become central: Google favours content written by genuine professionals who show real hands-on experience. Google's AI answers (SGE) and engines such as Perplexity draw on the best-structured content, so clear paragraphs, lists and definitions improve your chances of being cited. Voice search rewards natural phrasing and question-and-answer formats. Finally, search intent matters more than keyword density: it is better to answer a question perfectly than to repeat a phrase mechanically.
The long tail: the ideal SEO strategy for a small business
Plenty of business owners go straight for broad, highly competitive keywords such as "plumber" or "solicitor", which are impossible to win without a considerable budget. The winning strategy for a small business is the long tail: targeting precise phrases that are searched less often but are far easier to rank for and, above all, better qualified. "Gas boiler leak repair Rueil-Malmaison" attracts less volume than "plumber", but every visitor is a potential customer with clear buying intent. Add up dozens of these specific queries and you build steady, profitable traffic. These phrases are easy to find in Google's suggestions, in the "People also ask" section of the results, or in your Search Console reports once the site is live.
At ConvertiLab, we build SEO into every site from the design stage: content architecture, meta tags, sitemap, optimised loading speed, and a keyword strategy suited to your sector.
Practical examples
A plumber in Lyon optimises his Google Business Profile and his service pages for 'emergency plumber Lyon': he goes from 0 to 40 calls a month in 4 months.
An organic cosmetics retailer builds a blog with 50 articles optimised for long-tail queries: organic traffic rises from 500 to 8,000 visits a month in 8 months.
A law firm restructures its site architecture with internal linking by topic: its service pages gain 15 positions on Google on average in 3 months.
Frequently asked questions
How long does SEO take to show results?
The first SEO results usually appear between 3 and 6 months after the work starts. Significant results (top 3 for competitive keywords) often take 6 to 12 months of consistent effort. It is a long-term investment whose effects build up over time.
What budget should I plan for SEO?
SEO budgets depend on how competitive your sector is and what you want to achieve. For a local small business, expect between €490 and €1,500 a month. For a national site or an online shop, between €1,490 and €5,000 a month. Consistency is what matters: a modest budget over 12 months beats one large one-off push.
Is SEO still worth it now that AI has arrived in search?
Yes, SEO remains essential. Google's AI answers (SGE) and engines such as Perplexity rely on the best-ranked content. Good SEO is the foundation for being cited by AI. In 2026, organic traffic still accounts for more than 50% of web traffic worldwide.
Need help with SEO (Search Engine Optimization)?
Our experts work with you to put an effective strategy in place. Get a free, tailored quote within 24 hours.
Go further
Other definitions
Last updated: 6 April 2026
