Channel submission process helps you to control the submission of specific group of Products or the selected products to various channels for Advertising.
You can control the submission of a product to the following channels: 1 – Google Shopping Ads 2 – Google Dynamic Remarketing or Display Ads 3 – Pinterest 4 – Bing Shopping 5 – Facebook Catalog 6 – XML Feed

Refer to this link to see the steps on how to apply bulk edit to Products for Channel Submission: https://support.simprosys.com/faq/how-to-use-bulk-edit-feature-in-google-shopping-feed-gsf-app