Layered navigation generates millions of crawlable junk URLs
US enterprise Magento stores — apparel, industrial supply, electronics, home improvement — commonly have 20+ filterable attributes across hundreds of categories. The URL permutations generated by Magento layered navigation run into the millions. Google crawls these junk pages instead of the category and product pages that carry ranking value. US ecommerce is highly competitive. Crawl budget spent on filter permutations means your priority pages are crawled less frequently — slowing index updates and suppressing rankings in a market where competitors are actively investing in SEO architecture.