Internal Linking Strategy for Large Product Catalogues: A 2026 Guide for Melbourne Online Stores

A Melbourne homewares store we looked at recently had 2,400 products live and Google had indexed 900 of them. The rest weren’t broken, banned or duplicated, they were simply orphaned, buried four or five clicks from the homepage with no other page on the site linking to them. Internal linking is the least glamorous part of e-commerce SEO and the one large catalogues get wrong most often. This guide covers how to structure links across hundreds or thousands of products so Google can find and rank them, what that work costs and takes, and the mistakes that quietly bury inventory for months.

Why internal links make or break a large product catalogue

Google finds new and updated pages by following links, and a product page with no internal links pointing to it is, for practical purposes, invisible no matter how good the page itself is. Online shopping in Australia has kept growing regardless: Australians spent a record $82.6 billion online in 2025, up 14% year on year, with 9.8 million households now shopping online (Australia Post eCommerce Report). That growth means more competition for every category and product search, and the stores winning that competition are usually the ones whose entire catalogue is actually crawlable, not just the handful of hero products linked from the homepage.

Not sure how much of your catalogue Google can actually see? Our free 30-minute audit will show you, even if you never become a client. Book a free consultation.

The three-layer structure that works for big Melbourne stores

Google’s own guidance is straightforward: pages need to be reachable through crawlable links, not just a sitemap, for Google to reliably find and understand them (Google Search Central). For a catalogue of any real size, that means building three deliberate layers rather than relying on a single mega-menu: category pages that group related products and link out to every product in that group, cross-links between related or complementary products on each product page, and a handful of curated collection or guide pages that pull together products around a use case, gift idea or season. The table below compares this to the flat structure most stores default to without meaning to.

Structure	How shoppers find products	How Google finds products
Flat (homepage → search bar only)	Only if they already know what they want	Poorly, relies almost entirely on the sitemap
Category-only	Browsing within one category	Reasonably, but cross-category products get missed
Three-layer (category + cross-links + collections)	Browsing, related-product prompts, and curated guides	Well, every product has multiple paths leading to it

What it costs, how long it takes, and where large catalogues go wrong

For a store in the low thousands of SKUs, a proper internal linking overhaul, category page rebuilds, related-product modules and a set of collection pages, typically runs $2,500 to $6,000 depending on how much of it can be templated in your platform versus built by hand, and takes four to eight weeks. The upside is meaningful: analysis of e-commerce sites shows that putting a systematic internal linking structure in place can lift organic traffic by around 67% within 90 days while cutting bounce rates by roughly a third, because shoppers who land on one product are shown a genuine path to the next one (Digital Applied, Internal Linking Strategy 2026). On the flip side, an estimated 41% of even top-performing e-commerce sites are still underusing internal links, and roughly a quarter of product pages on a typical large catalogue receive no internal links at all, which is exactly how a $150 product can sit unsold for a year despite being exactly what someone searched for.

If a chunk of your catalogue looks like it’s sitting in the “orphaned” pile, fixing the worst of it is usually a two-week first pass. Talk to our Melbourne team about what that would look like for your store.

The most common mistake is treating the mega-menu as the whole strategy. A dropdown menu helps human visitors but Google discounts navigation links far more heavily than links inside actual content, so category descriptions, buying guides and related-product blocks matter more than most store owners assume. The second mistake is auto-generated “related products” widgets that just show four random items from the same category, which technically link but add nothing useful to either the shopper or the search engine.

A practical starting checklist

Start by pulling a list of pages Google hasn’t indexed from Search Console and checking how many clicks each one is from your homepage. Anything past three clicks is a strong candidate for a new cross-link or collection page. From there, add a genuine “related products” block based on shared attributes (material, use case, price bracket) rather than just category, and write two or three seasonal or gift-guide collection pages that link across categories your main navigation keeps separate. If your product images are also part of the slow-page problem, our guide on optimising product images for search and speed covers that alongside this. And if you’re on Shopify specifically, our Shopify SEO checklist covers several structural fixes that pair well with the linking work here. You can see the fuller version of how we run this process on our process page.

Frequently asked questions

How many internal links should a single product page have?
There’s no fixed number, but as a rough guide, a category link, three to six genuinely related products, and a mention in at least one collection or guide page is a reasonable minimum for a page you want to rank.

Will this work on Shopify, or do I need a custom-built site?
It works on Shopify, WooCommerce and Magento. The templates differ but the underlying structure, category, cross-link, collection, is platform-independent.

Do out-of-stock products need to keep their links?
If the product will come back in stock, yes, keep the page and its links live rather than deleting it, since removing and recreating pages repeatedly damages the ranking history you’ve already built.

A large catalogue with weak internal links is inventory Google can’t see and shoppers can’t find. Fixing the structure is one of the highest-leverage changes available for a Melbourne online store. Book your free consultation. No lock-in contracts, a Melbourne-based team, reply within 24 hours. More guides like this are on our blog.