Case 04 / 05Custom Shopify theme, SEO and GEO2026Live

A rebuilt Shopify theme with stock per store on every product page, a release calendar, a mega menu down to model level and SEO and GEO for 900+ product pages.

collett.nlCollett. webshop
collett.nl
Collett. webshop: Custom Shopify theme, SEO and GEO
Screenshot of the work

The brief

Two stores, a large online catalogue. Customers couldn’t see if their size was in store, product pages lacked copy and structured data, and visibility in Google and AI answers was low.

What we did

First a measuring tool: a baseline across 220 pages on eight dimensions. Then a rebuild with custom Liquid sections and snippets on Online Store 2.0, and a catalogue round product by product.

×3online revenue, almost tripled on average
900+product pages reviewed
220pages in the SEO and GEO audit
8dimensions measured, from tech to AI

What we built

Collett. webshop
  • Stock per store

    Stock per location on every product page, with a WhatsApp block to ask the store about a size. Collection pages filter by store stock.

  • Product page and buy box

    Size grid with half and third sizes, size chart per brand, ‘1 left’, Collett favourites and short team reviews. Below: ‘also in your size’ and ‘frequently bought together’, and an upsell in the cart.

  • Homepage and release calendar

    Video, brands as round cards, new arrivals, stores with live open status and a release calendar with drop dates.

  • SEO and GEO per product

    Meta titles and descriptions, colour and model variants, alt text and JSON-LD product data across the catalogue, for Google and AI assistants.

  • Measuring tool

    Our own audit scoring 220 pages on technical SEO, on-page, structured data, AI citability, content, local SEO, performance and internal links. Every improvement can be checked.

  • Speed and maintenance

    Self-hosted brand fonts, no preloader before first paint, version history per release and zero Theme Check errors.

In pictures

Scroll to browse
collett.nl
The product page with size grid and buy box.
01The product page with size grid and buy box.
collett.nl
Stock per store and the WhatsApp button to the store.
02Stock per store and the WhatsApp button to the store.
collett.nl
New arrivals, with Collett favourites.
03New arrivals, with Collett favourites.
collett.nl
Short team reviews and the release calendar.
04Short team reviews and the release calendar.

The hardest part

A catalogue that changes daily needs SEO and GEO as a system, not a project: fixed rules for titles, descriptions and product data, and an audit that shows where it lags. Round one took the overall score from 41.4 to 51.7.

Under the hood

Languages, frameworks and integrations
Languages
Liquid, JavaScript, CSS, JSON
Platform
Shopify Online Store 2.0
Theme
Custom sections and snippets on a premium base theme
Data
Shopify metafields, JSON-LD product data
Tools
Shopify CLI, Theme Check
Audit
Own SEO and GEO measuring tool
Fonts
Self-hosted
Process
Hidden test theme, publish after sign-off
Next case — 05 / 05Forza RotterdamWebsite, SEO, GEO and campaign