An email banner is the design that shows up at the very top of your email. While not all emails have a banner, your email banner design can be a powerful element that hooks your email readers in. 

Typically an email banner would include your company branding, a headline for your promotion, and some imagery to tie it together. 

So, if you’re adding an email banner, here are a few tips to keep in mind:

• Make it on brand: follow your brand guidelines in your banner color, design, and typography.
• Keep it consistent: make your banner consistent with your brand and email strategy.
• Optimize the design: make sure you follow best practices with the specs of your email banner.  This will ensure that your email is easily viewable. The recommended maximum height is between 90 and 150 pixels.