Today we are launching a new feature in Content API for Shopping v2.1: products.update .products.update method allows you to submit a subset of changes for a given product using the Products API. It works similarly to products.insert , but only requires the fields you would like to modify.inventory.set  in Content API v2, will be familiar with the ability to provide updates to price, availability and other limited fields. The products.update method goes one step further and allows you to modify any fields that are mutable with products.insert. Users that are migrating from v2 to v2.1  ahead of the September 30, 2021 sunset date, might find this new functionality useful.salePrice using REST:PATCH https://shoppingcontent.googleapis.com/content/v2.1/{merchantId}/products/{productId} 
{
  "salePrice": {
    "value": "17.99",
    "currency": "USD"
  }
}
 
products.custombatch  request. For more examples and use-cases, see the products.update  guide in the documentation.Content API for Shopping forum .