Helm › Helm University › Track 3 › Lesson 3.3
Lesson 3.3The recommended rail, and how to be in it
Twelve slots, matched by interest, and a single mis-typed field that takes you out of the running.
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This lesson prepares you to: Explain how Helm decides what to recommend, and name the one mistake that removes you from it entirely.
Twelve slots, matched by interest
The Shop home page carries a personalised rail. It works by taking the interests the shopper has chosen on Helm, finding which of the 23 categories map to those interests, and pulling products filed in those categories.
The rail holds 12 products. Within the matching set they are ordered by units sold, then review count, then how recently they were published.
That mapping is the interesting part. Helm did not build a second recommendation system for the Shop; it reused the interest engine the rest of the platform already runs on, which is why each of the 23 categories carries a list of Helm interest tags.
The rail is never empty
If a shopper has no interests set, or none of them match anything with stock, the rail falls back to products ordered by the same rule without the interest filter. So there is always something there, and a new shopper still sees a populated page.
The mistake that removes you
The recommended rail matches on the canonical category slug only.
A product carries two category fields for historical reasons: a legacy free text one and the canonical slug. Browse and the category counts will match either. The recommended rail matches only the slug.
So a product filed with a category typed by hand, or filed only in the legacy field, is browsable and searchable and can never be recommended to anybody. Nothing warns you. Nothing flags it. Your listing simply is not in the pool.
Wrong category slug is not a smaller audience. It is no recommended rail at all.
What to check
- Every live product has a category chosen from the 23, not typed.
- If you imported a catalogue, check the category on the imported products specifically. Imported products bypass the normal validation, and the category that came across may not be one of Helm's.
- Sell into a category consistently rather than scattering across many. Both the recommended rail and the verified rail reward a shopper recognising what you are.
Views are counted, but not yours
Product page views feed your analytics and the verified rail score. Helm deliberately skips counting a seller looking at their own listing, so refreshing your own page does nothing. The count is also best effort: if it fails it is dropped rather than breaking the page for a shopper.