Technical SEO: priorities for a website or online store

Technical SEO makes pages accessible to search engines. Check indexing, internal links, canonical URLs and performance before expanding content.

In the current digital landscape, visibility is the key to success, whether you run a showcase site presenting your services or a thriving e-commerce platform. However, much of this visibility is based on elements that are often invisible to the naked eye: Technical SEO. Far from content or netlinking strategies, technical SEO is the foundation on which your entire online performance is based. It ensures that search engines can explore, understand and index your site effectively, directly impacting your ranking and, ultimately, your revenue. For SMEs, e-commerce, SaaS platforms and even independents, neglecting this aspect can be costly. This article explores the key priorities of the technical SEO to maximize the presence of your website, focusing on actionable recommendations and errors to avoid.

The Crucial Foundations of the SEO Technique : Crawlability and Indexation

Before you even think about positioning, it is imperative that your site is accessible and understandable by search engine robots. Crawlability (the ability of robots to explore your site) and indexing (the ability of motors to add your pages to their index) are the pillars of the Technical SEO.

Robots.txt file and XML Sitemaps: Your Engine Guides

The file robots.txt is a kind of signal sign for robots. It tells them which sections of your site they can or cannot explore. An incorrect configuration can prevent indexing of crucial pages or, conversely, expose private areas. For an e-commerce site, it is common to block access to SEO-free internal filter pages or shopping baskets. However, be careful never to block access to your CSS or JavaScript files, as this would affect Google's visual understanding of your pages.

XML sitemaps, for their part, are lists of all URLs you want to see indexed. They act as an exhaustive roadmap for robots, helping them discover all your pages, even those that are not easily accessible via internal navigation. For a WordPress site or PrestaShop, extensions like Yoast SEO or Rank Math automatically generate and update these sitemaps, greatly simplifying this task. For applications developed with React or Next.js, the dynamic generation of sitemaps is essential, especially for sites with a lot of user-generated content or evolving product catalogues.

Management of Errors 404 and Forwarding 301: Preserving Experience and SEO Jus

Errors 404 (page not found) are inevitable, especially on sites with a lot of content or which have undergone redesigns. Too many 404 errors can damage the user experience and waste the engine's rawl budget. Set up a user-friendly 404 page that guides the user to other relevant content.

301 (permanent) redirections are crucial when you change the URL of a page or delete content. They report to search engines that the old page has moved to a new address, transferring most of its "jus SEO" (authority and relevance). Without 301 redirects, you lose the SEO benefit of old URLs and risk 404 errors in mass. Tools like Google Search Console or Screaming Frog will help you identify these errors and plan your redirections.

Site Performance and Speed: User Experience at the Heart of the SEO

The speed of loading a site is no longer a luxury, it is a requirement. Google has clearly indicated this with the integration of Core Web Vitals into its ranking algorithms. A slow site frustrates users and increases the rebound rate, negatively impacting your SEO.

Core Web Vitals: Measuring and Optimizing Web Vital Signs

Core Web Vitals measure three crucial aspects of the user experience:

Largest Contentful Paint (LCP) : The loading time of the largest visible content element. Ideally, less than 2.5 seconds.
First Input Delay (FID) The time before the page can respond to the user's first interaction. Ideally, less than 100 ms. (Replaces by Interaction to Next Paint (INP) from March 2024, which measures the latency of global interaction).
Cumulative Layout Shift (CLS) The visual stability of the page (the elements must not move during loading). Ideally, a score of 0.1 or less.

For an e-commerce site, a high LCP on a product page may mean a loss of sales. For a showcase site, an important CLS can make reading unpleasant. Tools like PageSpeed Insights, Lighthouse or GTmetrix are your allies to audit and identify weaknesses. Optimization requires concrete actions.

Optimization of Images, Code and Infrastructure

Images are often the biggest contributors to the slowness of a site. Use modern formats (WebP, AVIF), compress them without loss of quality and serve them as responsive (different sizes depending on the device). Lazy loading (delayed loading of non-visible images) is an essential technique. On a PrestaShop platform, dedicated modules can automate much of this process. For sites developed with React or Angular, managing assets and optimizing JavaScript/CSS bundles are critical.

Minimizing and compressing CSS, JavaScript and HTML files reduces their size. Using a Content Delivery Network (CDN) allows you to serve content from the server closest to the user, significantly reducing loading times, especially for global audiences. The choice of efficient hosting and caching are also fundamental. For a Next.js application, the server-side rendering (SSR) or static site generation (SSG) may offer exceptional performance, but require appropriate configuration to avoid client-side hydration traps.

Web Security and SEO: An Indispensable Alliance

A secure site is a trusted site, not only for your users but also for search engines. Cybersecurity is an indirect but powerful ranking factor in technical SEO. A compromised site can be de-referenced, and users' confidence will be severely shaken.

HTTPS : An Incontourable Standard

The Hypertext Transfer Protocol Secure is mandatory. It encrypts communication between the user's browser and your server, protecting sensitive data. Google has confirmed that HTTPS is a ranking signal. Make sure that your SSL/TLS certificate is properly installed and up-to-date, and that all content on your site is served via HTTPS (no mixed content). CMS such as WordPress or PrestaShop greatly facilitate this transition, but for custom applications, particular attention should be paid to server configuration and certificate deployment.

Protection against Threats and Vulnerability: Maintaining Integrity

DDoS attacks, SQL injections, malicious scripts and other threats can paralyse your site and have disastrous consequences for your reputation and SEO. Proactive maintenance is essential:

Regular updates of your CMS, themes and plugins (WordPress, PrestaShop).
Using web application firewalls (WAF) to filter malicious traffic.
Regular backups and restoration tests.
Continuous monitoring of access logs to detect suspicious activities.
Training of teams on good safety practices.

The integration of advanced security solutions, sometimes powered by AI to detect emerging threats, is an additional layer of protection. For example, an AI-based intrusion detection system can identify patterns of sophisticated attacks that would escape traditional human analysis.

Data Structure and Schema.org Marking for Advanced Technical SEO

The Schema.org markup allows search engines to better understand the context of your content. It's a form of Technical SEO which goes beyond keywords, by semantically describing your pages. This is not a direct ranking factor, but it can significantly increase the visibility of your site in the search results.

Enrich Research Results with Rich Snippets

By implementing Schema.org, you can qualify your pages to appear as "rich snippets" (enriched extracts) in SERPs (Search Engine Results Pages). These rich snippets, with rating stars, prices, event dates or images, get more user attention and increase click rate (CTR) even if your position is not the first. For an e-commerce site, displaying the price and availability of a product directly in the results is a major asset.

Types of Pertinent Diagrams for Vitrines and E-commerce Sites

Depending on the nature of your site, certain types of diagrams will be more relevant:

Product and Offer : Essential for e-commerce sites, to describe the products, their prices, reviews, availability.
LocalBusiness : Ideal for showcase sites of local companies, to indicate address, opening hours, telephone number.
Organization For all companies, providing information about the company itself (name, logo, URL).
Review or AggregateRating To view customer reviews and reviews.
FAQPage : For frequently asked questions and answers pages, allowing you to display the answers directly in SERPs in accordion form.
Article or BlogPosting For blog articles, with the author, date of publication, etc.

Implementation can be done manually in JSON-LD ( Google's preferred format) or via plugins for WordPress/PrestaShop, or libraries in frameworks like React. Always test your markup with Google's enriched results test tool to check its validity.

Mobile-First Indexing and Multi-Apparel Adaptability

Since 2018, Google mainly uses the mobile version of your site's content for indexing and ranking. This means that if your site is not optimized for mobile, it is penalized, even on desktop. Adaptability is non-negotiable.

Responsive Design and Mobile Performance: Absolute Priority

A responsive design, where your site automatically adapts to the size of the user's screen, is the norm. This ensures a consistent and positive user experience on all devices, from smartphones to tablets to desktop computers. Make sure that:

Texts are readable without zoom.
Interactive elements (buttons, links) are spaced enough to be typed easily.
The images and videos are quickly loaded and adapted to mobile devices.
Navigation is intuitive on small screen (burger menus, etc.).

Beyond the responsive, mobile performance is just as critical. Solutions such as Progressive Web Apps (PWA) can offer an experience close to the native application, with instant loading and the ability to use the website offline. For e-commerce, a PWA built with React or Angular can transform the mobile shopping experience and drastically reduce drop-out rates.

Impact of AI and Automation on Technical SEO

Artificial intelligence and automation revolutionize many aspects of digital marketing, and Technical SEO This is no exception. They offer analysis, optimization and problem detection capabilities at a scale and speed that cannot be reached manually.

Automated Audits and Performance Monitoring: AI at the Accuracy Service

AI-based technical SEO audit tools can now scan thousands of pages in minutes, identifying faults in drawability, markup problems, security vulnerabilities and performance optimization opportunities. These systems can detect complex patterns that indicate underlying problems, such as invisible redirection loops or subtle indexing problems. For large e-commerce platforms or SaaS with thousands of URLs, this automation is essential. AI can also analyze performance data (Core Web Vitals, loading time) continuously, alert in case of degradation and even suggest specific optimizations for code or infrastructure.

Semantic Optimization and Content Structuring: Beyond Keywords

AI also helps improve the semantic understanding of your content by search engines. By analyzing vast body of text, AI can suggest related terms and concepts to be incorporated to enrich the thematic relevance of a page, going well beyond the simple density of keywords. It can also help structure content optimally for Schema.org markup, automatically identifying entities (products, people, places) and relationships between them. For a digital studio, the integration of these technologies makes it possible to offer more efficient and responsive SEO services to its customers.

Another concrete example is the automation of SEO regression tests, which verify that a modification on the site did not introduce a new technical problem. A script can check daily that all important pages are indexable and that the redirects are functional, alerting the technical team immediately in case of a problem.

Conclusion: Investing in a Robust Technical SEO is Investing in the Future

Technical SEO is not just a list of tasks to check, it is a continuous, demanding and fundamental discipline for the success of any website, whether it is a showcase or e-commerce. Strong foundations for scaling and indexing, an obsession with performance and user experience, flawless security, intelligent data structuring and impeccable mobile adaptability are the pillars on which to build sustainable visibility. The integration of AI and automation opens up new perspectives for ever more fine and responsive optimizations.

Neglecting these aspects amounts to building a house on moving sands: the risk of collapse is constant. For an efficient and secure online presence, it is crucial to surround yourself with experts who master these complex issues. Whether you are considering a complete overhaul, a thorough audit of your site, the implementation of a preventive maintenance strategy or advanced technical SEO optimization, investment in these expertises is the guarantee of your digital success.

Need a custom SEO technical audit or a custom web strategy for your showcase or e-commerce site? Contact our experts to turn your technical challenges into growth opportunities.

To frame the actions adapted to your site, consult our service of SEO audit and optimization or request a quote for your web project.