Structuring an e-commerce catalog: categories, attributes and filters

The category tree

• Customer logic: "Women → Shoes → Sneakers", "Kitchen → Small appliances → Coffee machines".
• Shallow depth: two or three levels for most stores; deeper trees hide products.
• One primary category per product, with the option to appear in additional collections.
• Collections for occasions, seasons and promotions ("Novruz gifts", "Back to school") separate from the permanent tree.
• Names in customers' words, checked against search queries in each language.

Attributes

Each category has its own attributes. Shoes have size, colour, material and season; laptops have processor, memory, screen size. Define them as structured fields with controlled values — "Red", not "red", "RED" and "burgundy-ish" mixed. Structured attributes power filters, comparisons, product feeds for ads and marketplaces, and structured data for search.

Variants

Products that differ only by size or colour are usually one product with variants, each with its own SKU, stock and possibly price and images. This keeps reviews and content together and avoids duplicate pages. Products that differ substantially — different models — are separate products.

Filters

• Show filters relevant to the category, derived from attributes.
• Show counts and hide options with no products.
• Allow multiple selections where it makes sense (several brands) and ranges for numeric values (price, size).
• On mobile, make filters easy to open, apply and reset.
• Keep filters fast; slow filtering on large catalogs frustrates users.

Search

Internal search should handle typos, synonyms, product codes, and — for Azerbaijan — spelling with and without Azerbaijani letters and in Russian and Latin transliteration. Track searches with no results and fix them by adding synonyms or products.

SEO and indexable pages

Categories and important subcategories are valuable landing pages for search. Filter combinations can create thousands of URLs with little unique value. A common approach:

• make main categories and a curated set of valuable filter pages (for example "men's running shoes") indexable, with their own titles, descriptions and some text;
• keep other filter combinations out of the index using canonical tags, noindex or by not generating crawlable links for them;
• handle pagination so products deep in a category remain reachable.

See technical SEO and canonical URL.

Multilingual catalogs

Product names, descriptions, attribute names and values need translation. Controlled attribute values are translated once and applied to all products. Product URLs per language follow the site's language structure. See multilingual URL structure.

One source of product data

Product data often originates in 1C or a supplier's file and is enriched for the website with descriptions and images. Decide which fields come from which system, and sync automatically. See importing products and 1C integration.