Metafields Plus primarily focuses on allowing store owners to add custom fields to various parts of their store, including products, product variants, collections, and orders. The app offers a range of metafield types such as text fields, numbers, URLs, and more, enabling a high level of customization for store data. A key feature of Metafields Plus is its ease of use, integrating with the Shopify admin interface and providing bulk import/export capabilities to save time. This makes it an ideal solution for store owners looking to add detailed and specific information to their store items, thereby improving the management and presentation of their products and enhancing the overall customer experience.