Magento (and Adobe Commerce) audits surface the same five issues over and over. Here’s the breakdown.
Mistake 1: Layered navigation generating 10,000+ URLs
The default. Every attribute combination — colour + size + brand + price — produces a unique URL. Without a written rule set, you end up with tens of thousands of low-value attribute-combination URLs Google happily crawls and devalues.
Fix: Define which attribute combinations should rank (e.g., colour + category), which canonicalise back to the parent, which get noindex, and which never reach the index. Implement in Magento’s URL Rewrites and meta robots logic. This is the single biggest Magento SEO lift we ship.
Mistake 2: Catastrophic Core Web Vitals
Magento is heavy by default. Most stores we audit fail LCP and INP on mobile.
Fix: Audit installed modules for blocking JavaScript. Tune Varnish/Redis/CDN caching. Rework theme layout XML and Knockout JS where it’s killing INP. Profile with real-user CWV data, not lab scores. 20-40% LCP improvement is typically available within a sprint.
Mistake 3: Schema gaps on configurable products
Configurable products in Magento have a parent + variants. Schema implementation often gets one of them wrong: either the parent ships schema (and the variant pages don’t), or each variant ships schema with the wrong canonical.
Fix: Audit which URL is the canonical for each configurable. Ship Product schema on the canonical URL only. Validate with Rich Results Test on a representative sample.
Mistake 4: Multi-store with broken hreflang
Magento’s multi-store and multi-store-view setup is powerful, and most implementations get hreflang wrong. Common problems:
- Self-referencing pages without x-default.
- Hreflang declared in both HTML and sitemap (Google picks one randomly).
- Canonical URLs pointing across hreflang boundaries.
- Missing return tags — FR refers to EN but EN doesn’t refer back.
Fix: Implement hreflang in sitemap OR HTML — pick one. Validate with the Hreflang Tester. Confirm all return tags. See our broader International Ecommerce SEO coverage.
Mistake 5: Broken redirects after migration
Magento 1 to 2 migrations are particularly bad for this. Old URLs that ranked don’t get mapped to new equivalents. Categories restructure, products move, redirects don’t fire. Traffic drops by 30-50% in the months after launch.
Fix: Pre-migration audit catalogues every URL with traffic or backlinks. Redirect map built in spreadsheet, tested on staging, deployed in production. Search Console monitored daily for unexpected 404s in the four weeks post-launch.
See Migrations & Platform SEO for the full playbook. Specifically for Magento, our 2026 Magento SEO checklist covers the full audit list.
The common thread
All five mistakes share a root cause: Magento gives engineering teams enormous control, and SEO requirements aren’t in the default brief. SEO has to be involved before launch (and after every release), not bolted on after rankings drop.
For ongoing Magento SEO work in your release cycle, see Magento SEO Services.
