Google Merchant Center Integration
How to set up a product feed to Google Merchant Center
In the administrator, visit Settings -> Google Product Export Settings:
Under Nightly Job Settings, enable the nightly export file, and click Save Changes.
Next, copy the URL For Google URL, and use it for the following step.
Log into your Google Merchant Center account. If you have not created a Google Merchant Center Account with Google, create one first, and then log into the account.
Go here and look under the heading "Create a primary feed": https://support.google.com/merchants/answer/7439058?sjid=6360104091727741673-NA#zippy=%2Cinstructions
Expand the Instructions section under "Create a primary feed".
Follow the instructions and for "Input method" use "Scheduled fetch".
When it asks for the URL to fetch the feed from, copy the above URL from the administrator.