Pinterest is the second leading diver of social media traffic referrals to websites. Given that it's such a visual service, websites are always looking for interesting imagery to help drive that. Infographics are one type of content that can do well, while providing solid information that your site visitors will find valuable beyond just a picture.
A good place to start is to go with a subject that already has Pinterest appeal, such as travel, food, and marketing. It also recommends being funny, useful, or challenging, and making it informational. Beyond these tips, it has suggestions for fonts, colors, and format. Take a look:
Source: 6 Formulas for the Perfect Pinterest Infographic
Images via Pinterest, Venngage