eCommerce Faceted Navigation: Fixing Duplicate Content and Index Bloat
Filters for size, color, price, and sorting can create millions of duplicate URLs. Discover canonicalization, robots.txt, and parameter handling strategies.
Solving the Faceted Navigation Dilemma
Online stores often suffer from index bloat when search crawlers index endless permutations of filter parameters (`?color=red&size=large&sort=price_asc`).
Proven Engineering Solutions
• Self-Referential Canonical Tags on Root Categories: Canonicalize parameter URLs back to the primary category URL.
• Robots.txt Disallow Directives: Block crawlers from indexing sort and pagination filters that generate low-value duplicates.
• AJAX / Client-Side Filtering: Render dynamic filter attributes on the client side without altering indexable URL query strings unless they represent high-search-volume subcategories.
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