"Faceted navigation is a common feature of websites that allows its visitors to change how items (for example, products, articles, or events) are displayed on a page. However its most common implementation... can generate infinite URL spaces which harms the website in a couple ways."
"Regardless of what kind of site you have -- events, blog, or shop --, there's a reasonable chance that your site is exposing URLs that are just a variation of something already discovered under a different URL. These duplicate URLs waste your 'crawl budget' and your server resources..."
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