Publishing a Feed to the Merchant Center
Setting default values for your product attributes is a great way to save time when creating your feed.
To publish your feed to the Merchant Center, complete the following steps:
1. Click the “Publish” button. [screenshot15]
2. A dialogue box will pop up asking you to confirm if you want to publish. Click the “OK” button. [screenshot16]
Note: Publishing may take a few minutes, depending on the number of products you’re publishing. According to the Google Merchant Center, “updates to product data may not appear for up to 2 hours.”