What it does ? - Send customized emails for your users. Simply list the email IDs of all your users in a Google Sheet, enter changes for each users in the sheet, then use mail merge function to send the emails - Use your own Google Analytics to track email opens and maintain subscriptions of your users - Create and send invoices or reports using Google Docs or Google Slides as PDF attachments - Use Google Docs/Slides to create customized images for your users and add as inline images in your Gmail. These are customized according to the inputs in the Sheet - Inbuilt unsubscribe feature