A clickable banner image helps drive traffic to your website. The banner is the first thing readers see when they open your campaign and a simple link helps readers quickly find your website, or store, no matter the content that follows! Just as people expect your top logo on your website to take them to your home page, so too do folks expect that big beautiful image at the top of the email to take them out to your website.
Now your banner image will click through to your Website! You can view the campaign in preview mode to test the link, as well.