Technical SEO ensures that Google can crawl, index, and understand your catalog. Without it, no amount of content optimization will get your pages to rank. On a large catalog, technical foundations are the multiplier for all other SEO efforts.
The 6 pillars of technical SEO for e-commerce
- Robots.txt — controls which pages Googlebot can access
- XML sitemap — maps all important URLs for Googlebot
- Canonical tags — designates the reference URL among duplicates
- Structured data — Product schema for rich snippets
- Core Web Vitals — LCP, CLS, INP performance metrics
- Hreflang — international targeting for multilingual stores
Technical SEO audit tools
Crawl audit
Identify pages that should not be crawled (admin, filter URLs, pagination) and ensure all important product and category pages are crawlable and in the sitemap.
Structured data implementation
Deploy Product schema, BreadcrumbList, and AggregateRating across your entire catalog — enabling rich snippets and Google free listings for all products.
Performance optimization
Audit and improve Core Web Vitals: image compression (WebP), lazy loading, render-blocking script removal. Each improvement is both a ranking signal and a conversion improvement.
| Technical issue | Impact | Fix difficulty |
|---|---|---|
| Filter URL duplicates | High — crawl budget waste | Medium (canonical config) |
| Missing Product schema | High — no rich snippets | Medium (theme snippet) |
| Slow LCP (>4s) | Medium — ranking signal | Medium (image optimization) |
| Incorrect robots.txt | High — blocks indexation | Low (edit file) |
Start every technical SEO audit with Google Search Console Coverage report. The "Not indexed" tab tells you exactly which pages Google has found but refused to index — and why. This is your priority list.
Get a technical SEO audit
30 min Google Meet · PDF report included
Created in France (Annecy – Chantilly) · Email & Google Meet support
FAQ
Technical SEO covers the infrastructure: crawlability, indexation, structured data, page speed, hreflang, canonical tags, robots.txt. On-page SEO covers the content of each page: title tag, H1, meta description, keywords. Both are needed — technical SEO makes the content accessible; on-page SEO makes it relevant.