Basic setup for adding Gmail Annotations. You can also use Google’s Annotation Guide to test your code or look up additional samples. <!-- Gmail Discount Offer & Products Place the below code right before </head> --> <div itemscope="" itemtype="http://schema.org/Organization"> <meta itemprop="name" content="Dominic Belfiori" /> <meta itemprop="logo" content="https://dominicbelfiori.com/images/portrait-dominic.jpg" /> <meta itemprop="url" content="https://dominicbelfiori.com/" /> </div> <div itemscope="" itemtype="http://schema.org/EmailMessage"> <meta itemprop="subjectLine" content="Please add subject line" /> </div> <div itemscope itemtype="http://schema.org/DiscountOffer"> <meta itemprop="description" content="25% OFF" /> <meta itemprop="discountCode" content="YOURULE25" /> <meta itemprop="availabilityStarts" content="2024-01-31T00:00:00-0800" /> <meta itemprop="availabilityEnds" content="4000-12-31T23:59:59-0800" /> </div> Output: