E-commerce and large-blog sites routinely spray URLs like /products?sort=price&filter=red&page=2&utm_source=email. Googlebot crawls the combinatorial explosion; 80% of crawl budget goes to duplicates of the same canonical page. This auditor clusters URLs by parameter fingerprint and tells you which parameters to block.
Option A: sitemap URL (auto-extract). Option B: paste URL list (one per line, from GSC Coverage export or Screaming Frog).