To do this you will need to Ensure you have the Google Shopping Feed plugin installed.
Firstly go to Plugins within your Shopblocks admin:
Then select the Google Shopping Feed plugin:
Once installed go to Settings:
You will need to map your website categories to the closest Google category by starting to type the category name and selecting from the available options:
In your Google Merchant Account, define where the feed is coming from by pasting the File URL from Shopblocks and set the download frequency (e.g once per day):
Make sure to resolve any data errors shown in the top right 'Feed Status' section in Shopblocks. The feed will then automatically update at the intervals you set within Google Merchant Centre:
Finally click Save: