The Easymanage spreadsheet add-on uses all the power of data manipulation in Google Spreadsheets for updating and managing products in your store. Right now it's integrated with Magento 2 or Woocommerce web stores, but the website requires a special module to be installed. More at - https://easymanage.biz/
With this tool, you can:

1. Quick update with price, special price, status, qty, disable, enable products
2. Export customers, update them with newly registered, have their emails which can be used in marketing emails
3. Mail merge - create personalized emails per each customer, send them from your Gmail account, so they Inbox for sure
4. Update email content with products, cms blocks HTML using shortcodes
4. Manage unsubscribes
4. Easily update any product with any attribute
5. Import products
6. Create configurable products
7. Update products small images, base image, thumb image, gallery images
8. Update products custom options
9. Update products SEO data
10. Integration with your store
11. Update data in real-time

Magento 2, Woocommerce(Woo) and Shopify integrated