Markets emits one hreflang tag for every market and language pair, including irrelevant ones. Google indexes these alternates, dilutes the hreflang signal across the catalog, and may serve the wrong version to international visitors. Hreflang Cleaner replaces them with a matrix you control: you check the pairs that make SEO sense, the app injects exactly those tags into the head of every storefront page. Daily bulk sync and storefront health check keep everything in sync.