Will It Fit? adds a compatibility checker to your product pages, so shoppers can confirm a part, battery, filter or accessory fits their model before they buy. It draws on 9,500+ verified fitment entries across 25 product categories, so you don't build a compatibility database yourself, and maps your products automatically by GTIN, SKU or title, applying only exact matches. The result: fewer wrong-fit returns and more confident buyers, from a widget that installs with no code.