I wrote this tool over the weekend to experiment with Google's new Featured Images markup that allows the sender to designate a "featured image" of the email to be displayed when the recipient opens the Promotions tab in Grid View.
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Why Your Email May be Missing a Featured Image in the Gmail Grid View [Updated]

Gmail launched Grid View two days ago that featured listed emails in a grid view like a Pinterest pinboard.
One thing caught my eyes immediately. A fair number of emails did not have a featured image even though there were fairly large images
How to Create an Image Carousel for Email – Part 2 [Web & Desktop]
Posted in Email Marketing, Email Resource, Interactive Email, Interactive Email Tutorials by Justin On March 24, 2014

Gmail’s recent big marketshare bump
Posted in Email Marketing by Justin On March 20, 2014

Litmus publishes a report of email marketshare based upon the statistics that they collect from emails that are tracked using their Email Analytics service. In the February 2014 report, I noticed Gmail made a leap from 3.02%